diff --git a/github/AccessToken.py b/github/AccessToken.py
index 98169fa2..7cea4e86 100644
--- a/github/AccessToken.py
+++ b/github/AccessToken.py
@@ -21,16 +21,27 @@
 ################################################################################
 
 from datetime import datetime, timedelta, timezone
+from typing import Optional
 
 import github.GithubObject
 
+from .GithubObject import Attribute
+
 
 class AccessToken(github.GithubObject.NonCompletableGithubObject):
     """
     This class represents access tokens.
     """
 
-    def __repr__(self):
+    _created: datetime
+    _token: Attribute[str]
+    _type: Attribute[str]
+    _scope: Attribute[str]
+    _expires_in: Attribute[Optional[int]]
+    _refresh_token: Attribute[str]
+    _refresh_expires_in: Attribute[Optional[int]]
+
+    def __repr__(self) -> str:
         return self.get__repr__(
             {
                 "token": f"{self.token[:5]}...",
@@ -45,44 +56,42 @@ class AccessToken(github.GithubObject.NonCompletableGithubObject):
         )
 
     @property
-    def token(self):
+    def token(self) -> str:
         """
         :type: string
         """
         return self._token.value
 
     @property
-    def type(self):
+    def type(self) -> str:
         """
         :type: string
         """
         return self._type.value
 
     @property
-    def scope(self):
+    def scope(self) -> str:
         """
         :type: string
         """
         return self._scope.value
 
     @property
-    def created(self):
+    def created(self) -> datetime:
         """
         :type: datetime
         """
         return self._created
 
     @property
-    def expires_in(self):
+    def expires_in(self) -> Optional[int]:
         """
         :type: Optional[int]
         """
-        if self._expires_in is not github.GithubObject.NotSet:
-            return self._expires_in.value
-        return None
+        return self._expires_in.value
 
     @property
-    def expires_at(self):
+    def expires_at(self) -> Optional[datetime]:
         """
         :type: Optional[datetime]
         """
@@ -92,25 +101,21 @@ class AccessToken(github.GithubObject.NonCompletableGithubObject):
         return None
 
     @property
-    def refresh_token(self):
+    def refresh_token(self) -> Optional[str]:
         """
         :type: Optional[string]
         """
-        if self._refresh_token is not github.GithubObject.NotSet:
-            return self._refresh_token.value
-        return None
+        return self._refresh_token.value
 
     @property
-    def refresh_expires_in(self):
+    def refresh_expires_in(self) -> Optional[int]:
         """
         :type: Optional[int]
         """
-        if self._refresh_expires_in is not github.GithubObject.NotSet:
-            return self._refresh_expires_in.value
-        return None
+        return self._refresh_expires_in.value
 
     @property
-    def refresh_expires_at(self):
+    def refresh_expires_at(self) -> Optional[datetime]:
         """
         :type: Optional[datetime]
         """
diff --git a/github/AccessToken.pyi b/github/AccessToken.pyi
deleted file mode 100644
index a0f959f9..00000000
--- a/github/AccessToken.pyi
+++ /dev/null
@@ -1,29 +0,0 @@
-import datetime
-from typing import Any, Dict, Optional
-
-from github.Auth import AppUserAuth
-from github.GithubObject import NonCompletableGithubObject
-
-class AccessToken(NonCompletableGithubObject):
-    def __repr__(self) -> str: ...
-    def _initAttributes(self) -> None: ...
-    def _useAttributes(self, attributes: Dict[str, Any]) -> None: ...
-    @property
-    def token(self) -> str: ...
-    @property
-    def type(self) -> str: ...
-    @property
-    def scope(self) -> str: ...
-    @property
-    def created(self) -> datetime.datetime: ...
-    @property
-    def expires_in(self) -> Optional[int]: ...
-    @property
-    def expires_at(self) -> Optional[datetime.datetime]: ...
-    @property
-    def refresh_token(self) -> Optional[str]: ...
-    @property
-    def refresh_expires_in(self) -> Optional[int]: ...
-    @property
-    def refresh_expires_at(self) -> Optional[datetime.datetime]: ...
-    def as_app_user_auth(self) -> AppUserAuth: ...
diff --git a/github/Authorization.py b/github/Authorization.py
index b495d4b3..5fe99f86 100644
--- a/github/Authorization.py
+++ b/github/Authorization.py
@@ -27,9 +27,15 @@
 # along with PyGithub. If not, see <http://www.gnu.org/licenses/>.             #
 #                                                                              #
 ################################################################################
+from datetime import datetime
+from typing import TYPE_CHECKING, List, Optional
 
 import github.AuthorizationApplication
 import github.GithubObject
+from github.GithubObject import Attribute, NotSet, Opt, _NotSetType
+
+if TYPE_CHECKING:
+    from github.AuthorizationApplication import AuthorizationApplication
 
 
 class Authorization(github.GithubObject.CompletableGithubObject):
@@ -37,19 +43,26 @@ class Authorization(github.GithubObject.CompletableGithubObject):
     This class represents Authorizations. The reference can be found here https://docs.github.com/en/enterprise-server@3.0/rest/reference/oauth-authorizations
     """
 
-    def __repr__(self):
+    _app: Attribute["AuthorizationApplication"]
+    _created_at: Attribute[datetime]
+    _id: Attribute[int]
+    _note: Attribute[Optional[str]]
+    _note_url: Attribute[Optional[str]]
+    _scopes: Attribute[str]
+    _token: Attribute[str]
+    _updated_at: Attribute[datetime]
+    _url: Attribute[str]
+
+    def __repr__(self) -> str:
         return self.get__repr__({"scopes": self._scopes.value})
 
     @property
-    def app(self):
-        """
-        :type: :class:`github.AuthorizationApplication.AuthorizationApplication`
-        """
+    def app(self) -> "AuthorizationApplication":
         self._completeIfNotSet(self._app)
         return self._app.value
 
     @property
-    def created_at(self):
+    def created_at(self) -> datetime:
         """
         :type: datetime.datetime
         """
@@ -57,76 +70,54 @@ class Authorization(github.GithubObject.CompletableGithubObject):
         return self._created_at.value
 
     @property
-    def id(self):
-        """
-        :type: integer
-        """
+    def id(self) -> int:
         self._completeIfNotSet(self._id)
         return self._id.value
 
     @property
-    def note(self):
-        """
-        :type: string
-        """
+    def note(self) -> Optional[str]:
         self._completeIfNotSet(self._note)
         return self._note.value
 
     @property
-    def note_url(self):
-        """
-        :type: string
-        """
+    def note_url(self) -> Optional[str]:
         self._completeIfNotSet(self._note_url)
         return self._note_url.value
 
     @property
-    def scopes(self):
-        """
-        :type: list of string
-        """
+    def scopes(self) -> str:
         self._completeIfNotSet(self._scopes)
         return self._scopes.value
 
     @property
-    def token(self):
-        """
-        :type: string
-        """
+    def token(self) -> str:
         self._completeIfNotSet(self._token)
         return self._token.value
 
     @property
-    def updated_at(self):
-        """
-        :type: datetime.datetime
-        """
+    def updated_at(self) -> datetime:
         self._completeIfNotSet(self._updated_at)
         return self._updated_at.value
 
     @property
-    def url(self):
-        """
-        :type: string
-        """
+    def url(self) -> str:
         self._completeIfNotSet(self._url)
         return self._url.value
 
-    def delete(self):
+    def delete(self) -> None:
         """
         :calls: `DELETE /authorizations/{id} <https://docs.github.com/en/developers/apps/authorizing-oauth-apps>`_
-        :rtype: None
         """
         headers, data = self._requester.requestJsonAndCheck("DELETE", self.url)
 
     def edit(
         self,
-        scopes=github.GithubObject.NotSet,
-        add_scopes=github.GithubObject.NotSet,
-        remove_scopes=github.GithubObject.NotSet,
-        note=github.GithubObject.NotSet,
-        note_url=github.GithubObject.NotSet,
-    ):
+        scopes: Opt[List[str]] = NotSet,
+        add_scopes: Opt[List[str]] = NotSet,
+        remove_scopes: Opt[List[str]] = NotSet,
+        note: Opt[str] = NotSet,
+        note_url: Opt[str] = NotSet,
+    ) -> None:
         """
         :calls: `PATCH /authorizations/{id} <https://docs.github.com/en/developers/apps/authorizing-oauth-apps>`_
         :param scopes: list of string
@@ -136,45 +127,43 @@ class Authorization(github.GithubObject.CompletableGithubObject):
         :param note_url: string
         :rtype: None
         """
-        assert scopes is github.GithubObject.NotSet or all(
+        assert isinstance(scopes, _NotSetType) or all(
             isinstance(element, str) for element in scopes
         ), scopes
-        assert add_scopes is github.GithubObject.NotSet or all(
+        assert isinstance(add_scopes, _NotSetType) or all(
             isinstance(element, str) for element in add_scopes
         ), add_scopes
-        assert remove_scopes is github.GithubObject.NotSet or all(
+        assert isinstance(remove_scopes, _NotSetType) or all(
             isinstance(element, str) for element in remove_scopes
         ), remove_scopes
-        assert note is github.GithubObject.NotSet or isinstance(note, str), note
-        assert note_url is github.GithubObject.NotSet or isinstance(
-            note_url, str
-        ), note_url
-        post_parameters = dict()
-        if scopes is not github.GithubObject.NotSet:
-            post_parameters["scopes"] = scopes
-        if add_scopes is not github.GithubObject.NotSet:
-            post_parameters["add_scopes"] = add_scopes
-        if remove_scopes is not github.GithubObject.NotSet:
-            post_parameters["remove_scopes"] = remove_scopes
-        if note is not github.GithubObject.NotSet:
-            post_parameters["note"] = note
-        if note_url is not github.GithubObject.NotSet:
-            post_parameters["note_url"] = note_url
+        assert isinstance(note, (_NotSetType, str)), note
+        assert isinstance(note_url, (_NotSetType, str)), note_url
+
+        post_parameters = NotSet.remove_unset_items(
+            {
+                "scopes": scopes,
+                "add_scopes": add_scopes,
+                "remove_scopes": remove_scopes,
+                "note": note,
+                "note_url": note_url,
+            }
+        )
+
         headers, data = self._requester.requestJsonAndCheck(
             "PATCH", self.url, input=post_parameters
         )
         self._useAttributes(data)
 
     def _initAttributes(self):
-        self._app = github.GithubObject.NotSet
-        self._created_at = github.GithubObject.NotSet
-        self._id = github.GithubObject.NotSet
-        self._note = github.GithubObject.NotSet
-        self._note_url = github.GithubObject.NotSet
-        self._scopes = github.GithubObject.NotSet
-        self._token = github.GithubObject.NotSet
-        self._updated_at = github.GithubObject.NotSet
-        self._url = github.GithubObject.NotSet
+        self._app = NotSet
+        self._created_at = NotSet
+        self._id = NotSet
+        self._note = NotSet
+        self._note_url = NotSet
+        self._scopes = NotSet
+        self._token = NotSet
+        self._updated_at = NotSet
+        self._url = NotSet
 
     def _useAttributes(self, attributes):
         if "app" in attributes:  # pragma no branch
diff --git a/github/Authorization.pyi b/github/Authorization.pyi
deleted file mode 100644
index 059485ce..00000000
--- a/github/Authorization.pyi
+++ /dev/null
@@ -1,37 +0,0 @@
-from datetime import datetime
-from typing import Any, Dict, List, Optional, Union
-
-from github.AuthorizationApplication import AuthorizationApplication
-from github.GithubObject import CompletableGithubObject, _NotSetType
-
-class Authorization(CompletableGithubObject):
-    def __repr__(self) -> str: ...
-    def _initAttributes(self) -> None: ...
-    def _useAttributes(self, attributes: Dict[str, Any]) -> None: ...
-    @property
-    def app(self) -> AuthorizationApplication: ...
-    @property
-    def created_at(self) -> datetime: ...
-    def delete(self) -> None: ...
-    def edit(
-        self,
-        scopes: Union[_NotSetType, List[str]] = ...,
-        add_scopes: Union[_NotSetType, List[str]] = ...,
-        remove_scopes: Union[_NotSetType, List[str]] = ...,
-        note: Union[_NotSetType, str] = ...,
-        note_url: Union[_NotSetType, str] = ...,
-    ) -> None: ...
-    @property
-    def id(self) -> int: ...
-    @property
-    def note(self) -> Optional[str]: ...
-    @property
-    def note_url(self) -> Optional[str]: ...
-    @property
-    def scopes(self) -> List[str]: ...
-    @property
-    def token(self) -> str: ...
-    @property
-    def updated_at(self) -> datetime: ...
-    @property
-    def url(self) -> str: ...
diff --git a/github/GithubException.py b/github/GithubException.py
index 46fb0414..717102ca 100644
--- a/github/GithubException.py
+++ b/github/GithubException.py
@@ -42,7 +42,7 @@ class GithubException(Exception):
     def __init__(
         self,
         status: int,
-        data: Dict[str, Union[str, List[str], List[Dict[str, str]]]],
+        data: Union[str, Dict[str, Union[str, List[str], List[Dict[str, str]]]]],
         headers: Optional[Dict[str, str]],
     ):
         super().__init__()
@@ -59,7 +59,9 @@ class GithubException(Exception):
         return self.__status
 
     @property
-    def data(self) -> Dict[str, Union[str, List[str], List[Dict[str, str]]]]:
+    def data(
+        self,
+    ) -> Union[str, Dict[str, Union[str, List[str], List[Dict[str, str]]]]]:
         """
         The (decoded) data returned by the Github API
         """
diff --git a/github/GithubObject.py b/github/GithubObject.py
index 3ad6f867..6cea1cc0 100644
--- a/github/GithubObject.py
+++ b/github/GithubObject.py
@@ -41,40 +41,75 @@
 import datetime
 import typing
 from operator import itemgetter
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Dict,
+    Generic,
+    List,
+    Optional,
+    Type,
+    Union,
+)
 
-from . import Consts, GithubException
+from . import Consts
+from .GithubException import BadAttributeException, IncompletableObject
+
+if TYPE_CHECKING:
+    from .Requester import Requester
+
+T = typing.TypeVar("T")
 
 
-class _NotSetType:
+class Attribute(Generic[T]):
+    @property
+    def value(self) -> T:
+        raise NotImplementedError
+
+
+class _NotSetType(Attribute):
     def __repr__(self):
         return "NotSet"
 
-    value = None
+    @property
+    def value(self):
+        return None
+
+    @staticmethod
+    def remove_unset_items(data: Dict[str, Any]) -> Dict[str, Any]:
+        return {
+            key: value
+            for key, value in data.items()
+            if not isinstance(value, _NotSetType)
+        }
 
 
 NotSet = _NotSetType()
 
-T = typing.TypeVar("T")
-
-OptionallySet = typing.Union[T, _NotSetType]
+Opt = Union[T, _NotSetType]
 
 
-class _ValuedAttribute:
-    def __init__(self, value):
-        self.value = value
+class _ValuedAttribute(Attribute, Generic[T]):
+    def __init__(self, value: T):
+        self._value = value
+
+    @property
+    def value(self) -> T:
+        return self._value
 
 
-class _BadAttribute:
-    def __init__(self, value, expectedType, exception=None):
+class _BadAttribute(Attribute):
+    def __init__(
+        self, value: Any, expectedType: Any, exception: Optional[Exception] = None
+    ):
         self.__value = value
         self.__expectedType = expectedType
         self.__exception = exception
 
     @property
     def value(self):
-        raise GithubException.BadAttributeException(
-            self.__value, self.__expectedType, self.__exception
-        )
+        raise BadAttributeException(self.__value, self.__expectedType, self.__exception)
 
 
 class GithubObject:
@@ -86,12 +121,19 @@ class GithubObject:
     A global debug flag to enable header validation by requester for all objects
     """
     CHECK_AFTER_INIT_FLAG = False
+    _url: Attribute[str]
 
     @classmethod
-    def setCheckAfterInitFlag(cls, flag):
+    def setCheckAfterInitFlag(cls, flag: bool) -> None:
         cls.CHECK_AFTER_INIT_FLAG = flag
 
-    def __init__(self, requester, headers, attributes, completed):
+    def __init__(
+        self,
+        requester: "Requester",
+        headers: Dict[str, Union[str, int]],
+        attributes: Any,
+        completed: bool,
+    ):
         self._requester = requester
         self._initAttributes()
         self._storeAndUseAttributes(headers, attributes)
@@ -101,7 +143,9 @@ class GithubObject:
         if self.CHECK_AFTER_INIT_FLAG:  # pragma no branch (Flag always set in tests)
             requester.check_me(self)
 
-    def _storeAndUseAttributes(self, headers, attributes):
+    def _storeAndUseAttributes(
+        self, headers: Dict[str, Union[str, int]], attributes: Any
+    ) -> None:
         # Make sure headers are assigned before calling _useAttributes
         # (Some derived classes will use headers in _useAttributes)
         self._headers = headers
@@ -109,7 +153,7 @@ class GithubObject:
         self._useAttributes(attributes)
 
     @property
-    def raw_data(self):
+    def raw_data(self) -> Dict[str, Any]:
         """
         :type: dict
         """
@@ -117,7 +161,7 @@ class GithubObject:
         return self._rawData
 
     @property
-    def raw_headers(self):
+    def raw_headers(self) -> Dict[str, Union[str, int]]:
         """
         :type: dict
         """
@@ -125,43 +169,45 @@ class GithubObject:
         return self._headers
 
     @staticmethod
-    def _parentUrl(url):
+    def _parentUrl(url: str) -> str:
         return "/".join(url.split("/")[:-1])
 
     @staticmethod
-    def __makeSimpleAttribute(value, type):
+    def __makeSimpleAttribute(value: Any, type: Type[T]) -> Attribute[T]:
         if value is None or isinstance(value, type):
-            return _ValuedAttribute(value)
+            return _ValuedAttribute(value)  # type: ignore
         else:
-            return _BadAttribute(value, type)
+            return _BadAttribute(value, type)  # type: ignore
 
     @staticmethod
-    def __makeSimpleListAttribute(value, type):
+    def __makeSimpleListAttribute(value: list, type: Type[T]) -> Attribute[T]:
         if isinstance(value, list) and all(
             isinstance(element, type) for element in value
         ):
-            return _ValuedAttribute(value)
+            return _ValuedAttribute(value)  # type: ignore
         else:
-            return _BadAttribute(value, [type])
+            return _BadAttribute(value, [type])  # type: ignore
 
     @staticmethod
-    def __makeTransformedAttribute(value, type, transform):
+    def __makeTransformedAttribute(
+        value: T, type: Type[T], transform: Callable[[T], Any]
+    ) -> Attribute[T]:
         if value is None:
-            return _ValuedAttribute(None)
+            return _ValuedAttribute(None)  # type: ignore
         elif isinstance(value, type):
             try:
                 return _ValuedAttribute(transform(value))
             except Exception as e:
-                return _BadAttribute(value, type, e)
+                return _BadAttribute(value, type, e)  # type: ignore
         else:
-            return _BadAttribute(value, type)
+            return _BadAttribute(value, type)  # type: ignore
 
     @staticmethod
-    def _makeStringAttribute(value):
+    def _makeStringAttribute(value: Optional[Union[int, str]]) -> Attribute[str]:
         return GithubObject.__makeSimpleAttribute(value, str)
 
     @staticmethod
-    def _makeIntAttribute(value):
+    def _makeIntAttribute(value: Optional[Union[int, str]]) -> Attribute[int]:
         return GithubObject.__makeSimpleAttribute(value, int)
 
     @staticmethod
@@ -169,21 +215,21 @@ class GithubObject:
         return GithubObject.__makeSimpleAttribute(value, float)
 
     @staticmethod
-    def _makeBoolAttribute(value):
+    def _makeBoolAttribute(value: Optional[bool]) -> Attribute[bool]:
         return GithubObject.__makeSimpleAttribute(value, bool)
 
     @staticmethod
-    def _makeDictAttribute(value):
+    def _makeDictAttribute(value: Dict[str, Any]) -> Attribute[dict]:
         return GithubObject.__makeSimpleAttribute(value, dict)
 
     @staticmethod
-    def _makeTimestampAttribute(value):
+    def _makeTimestampAttribute(value: int) -> Attribute[int]:
         return GithubObject.__makeTransformedAttribute(
             value, int, datetime.datetime.utcfromtimestamp
         )
 
     @staticmethod
-    def _makeDatetimeAttribute(value):
+    def _makeDatetimeAttribute(value: Optional[Union[int, str]]) -> Attribute:
         def parseDatetime(s):
             if (
                 len(s) == 24
@@ -202,7 +248,7 @@ class GithubObject:
 
         return GithubObject.__makeTransformedAttribute(value, str, parseDatetime)
 
-    def _makeClassAttribute(self, klass, value):
+    def _makeClassAttribute(self, klass: Any, value: Any) -> Attribute:
         return GithubObject.__makeTransformedAttribute(
             value,
             dict,
@@ -210,22 +256,30 @@ class GithubObject:
         )
 
     @staticmethod
-    def _makeListOfStringsAttribute(value):
+    def _makeListOfStringsAttribute(
+        value: Union[List[List[str]], List[str], List[Union[str, int]]]
+    ) -> Attribute:
         return GithubObject.__makeSimpleListAttribute(value, str)
 
     @staticmethod
-    def _makeListOfIntsAttribute(value):
+    def _makeListOfIntsAttribute(value: List[int]) -> Attribute:
         return GithubObject.__makeSimpleListAttribute(value, int)
 
     @staticmethod
-    def _makeListOfDictsAttribute(value):
+    def _makeListOfDictsAttribute(
+        value: List[Dict[str, Union[str, List[Dict[str, Union[str, List[int]]]]]]]
+    ) -> Attribute:
         return GithubObject.__makeSimpleListAttribute(value, dict)
 
     @staticmethod
-    def _makeListOfListOfStringsAttribute(value):
+    def _makeListOfListOfStringsAttribute(
+        value: List[List[str]],
+    ) -> Attribute:
         return GithubObject.__makeSimpleListAttribute(value, list)
 
-    def _makeListOfClassesAttribute(self, klass, value):
+    def _makeListOfClassesAttribute(
+        self, klass: Any, value: Any
+    ) -> Union[_ValuedAttribute, _BadAttribute]:
         if isinstance(value, list) and all(
             isinstance(element, dict) for element in value
         ):
@@ -238,7 +292,14 @@ class GithubObject:
         else:
             return _BadAttribute(value, [dict])
 
-    def _makeDictOfStringsToClassesAttribute(self, klass, value):
+    def _makeDictOfStringsToClassesAttribute(
+        self,
+        klass: Type["NonCompletableGithubObject"],
+        value: Dict[
+            str,
+            Union[int, Dict[str, Union[str, int, None]], Dict[str, Union[str, int]]],
+        ],
+    ) -> Union[_ValuedAttribute, _BadAttribute]:
         if isinstance(value, dict) and all(
             isinstance(key, str) and isinstance(element, dict)
             for key, element in value.items()
@@ -253,20 +314,20 @@ class GithubObject:
             return _BadAttribute(value, {str: dict})
 
     @property
-    def etag(self):
+    def etag(self) -> Optional[str]:
         """
         :type: str
         """
-        return self._headers.get(Consts.RES_ETAG)
+        return self._headers.get(Consts.RES_ETAG)  # type: ignore
 
     @property
-    def last_modified(self):
+    def last_modified(self) -> Optional[str]:
         """
         :type: str
         """
-        return self._headers.get(Consts.RES_LAST_MODIFIED)
+        return self._headers.get(Consts.RES_LAST_MODIFIED)  # type: ignore
 
-    def get__repr__(self, params):
+    def get__repr__(self, params: Dict[str, Any]) -> str:
         """
         Converts the object to a nicely printable string.
         """
@@ -285,44 +346,57 @@ class GithubObject:
             params=", ".join(list(format_params(params))),
         )
 
+    def _initAttributes(self):
+        raise NotImplementedError("BUG: Not Implemented _initAttributes")
+
+    def _useAttributes(self, attributes):
+        raise NotImplementedError("BUG: Not Implemented _useAttributes")
+
+    def _completeIfNeeded(self):
+        raise NotImplementedError("BUG: Not Implemented _completeIfNeeded")
+
 
 class NonCompletableGithubObject(GithubObject):
-    def _completeIfNeeded(self):
+    def _completeIfNeeded(self) -> None:
         pass
 
 
 class CompletableGithubObject(GithubObject):
-    def __init__(self, requester, headers, attributes, completed):
+    def __init__(
+        self,
+        requester: "Requester",
+        headers: Dict[str, Union[str, int]],
+        attributes: Dict[str, Any],
+        completed: bool,
+    ):
         super().__init__(requester, headers, attributes, completed)
         self.__completed = completed
 
-    def __eq__(self, other):
+    def __eq__(self, other: Any) -> bool:
         return other.__class__ is self.__class__ and other._url.value == self._url.value
 
     def __hash__(self):
         return hash(self._url.value)
 
-    def __ne__(self, other):
+    def __ne__(self, other: Any) -> bool:
         return not self == other
 
-    def _completeIfNotSet(self, value):
-        if value is NotSet:
+    def _completeIfNotSet(self, value: Attribute) -> None:
+        if isinstance(value, _NotSetType):
             self._completeIfNeeded()
 
-    def _completeIfNeeded(self):
+    def _completeIfNeeded(self) -> None:
         if not self.__completed:
             self.__complete()
 
     def __complete(self):
         if self._url.value is None:
-            raise GithubException.IncompletableObject(
-                400, "Returned object contains no URL", None
-            )
+            raise IncompletableObject(400, "Returned object contains no URL", None)
         headers, data = self._requester.requestJsonAndCheck("GET", self._url.value)
         self._storeAndUseAttributes(headers, data)
         self.__completed = True
 
-    def update(self, additional_headers=None):
+    def update(self, additional_headers: Optional[Dict[str, Any]] = None) -> bool:
         """
         Check and update the object with conditional request
         :rtype: Boolean value indicating whether the object is changed
@@ -341,7 +415,7 @@ class CompletableGithubObject(GithubObject):
         if status == 304:
             return False
         else:
-            headers, data = self._requester._Requester__check(
+            headers, data = self._requester._Requester__check(  # type: ignore
                 status, responseHeaders, output
             )
             self._storeAndUseAttributes(headers, data)
diff --git a/github/GithubObject.pyi b/github/GithubObject.pyi
deleted file mode 100644
index cada21e8..00000000
--- a/github/GithubObject.pyi
+++ /dev/null
@@ -1,134 +0,0 @@
-from typing import Any, Callable, Dict, List, Optional, Type, Union, TypeVar
-
-from github.Commit import Commit
-from github.GistFile import GistFile
-from github.GitRelease import GitRelease
-from github.NamedUser import NamedUser
-from github.Organization import Organization
-from github.PullRequestReview import PullRequestReview
-from github.Requester import Requester
-
-class GithubObject:
-    _requester: Optional[Requester]
-    def __init__(
-        self,
-        requester: Optional[Requester],
-        headers: Dict[str, Union[str, int]],
-        attributes: Any,
-        completed: bool,
-    ) -> None: ...
-    @staticmethod
-    def _makeBoolAttribute(value: Optional[bool]) -> _ValuedAttribute: ...
-    def _makeClassAttribute(
-        self, klass: Any, value: Any
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def _makeDatetimeAttribute(
-        value: Optional[Union[int, str]]
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def _makeDictAttribute(value: Dict[str, Any]) -> _ValuedAttribute: ...
-    def _makeDictOfStringsToClassesAttribute(
-        self,
-        klass: Type[GistFile],
-        value: Dict[
-            str,
-            Union[int, Dict[str, Union[str, int, None]], Dict[str, Union[str, int]]],
-        ],
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def _makeIntAttribute(
-        value: Optional[Union[int, str]]
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    def _makeListOfClassesAttribute(
-        self, klass: Any, value: Any
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def _makeListOfDictsAttribute(
-        value: List[Dict[str, Union[str, List[Dict[str, Union[str, List[int]]]]]]]
-    ) -> _ValuedAttribute: ...
-    @staticmethod
-    def _makeListOfIntsAttribute(value: List[int]) -> _ValuedAttribute: ...
-    @staticmethod
-    def _makeListOfListOfStringsAttribute(
-        value: List[List[str]],
-    ) -> _ValuedAttribute: ...
-    @staticmethod
-    def _makeListOfStringsAttribute(
-        value: Union[List[List[str]], List[str], List[Union[str, int]]]
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def __makeSimpleAttribute(
-        value: Any, type: type
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def __makeSimpleListAttribute(
-        value: list, type: type
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def __makeTransformedAttribute(
-        value: Any, type: type, transform: Callable[..., Any]
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def _makeStringAttribute(
-        value: Optional[Union[int, str]]
-    ) -> Union[_ValuedAttribute, _BadAttribute]: ...
-    @staticmethod
-    def _makeTimestampAttribute(value: int) -> _ValuedAttribute: ...
-    @staticmethod
-    def _parentUrl(url: str) -> str: ...
-    def _storeAndUseAttributes(
-        self, headers: Dict[str, Union[str, int]], attributes: Any
-    ) -> None: ...
-    @property
-    def etag(self) -> Optional[str]: ...
-    def get__repr__(self, params: Dict[str, Any]) -> str: ...
-    @property
-    def last_modified(self) -> Optional[str]: ...
-    @property
-    def raw_data(self) -> Dict[str, Any]: ...
-    @property
-    def raw_headers(self) -> Dict[str, Union[str, int]]: ...
-    @classmethod
-    def setCheckAfterInitFlag(cls, flag: bool) -> None: ...
-
-class NonCompletableGithubObject(GithubObject):
-    def _completeIfNeeded(self) -> None: ...
-
-class CompletableGithubObject(GithubObject):
-    _requester: Requester
-    def __eq__(self, other: Any) -> bool: ...
-    def __init__(
-        self,
-        requester: Requester,
-        headers: Dict[str, Union[str, int]],
-        attributes: Dict[str, Any],
-        completed: bool,
-    ) -> None: ...
-    def __ne__(self, other: Any) -> bool: ...
-    def _completeIfNeeded(self) -> None: ...
-    def _completeIfNotSet(
-        self, value: Union[_ValuedAttribute, _BadAttribute, _NotSetType]
-    ) -> None: ...
-    def update(self) -> bool: ...
-
-class _BadAttribute:
-    def __init__(
-        self, value: Any, expectedType: Any, exception: Optional[ValueError] = ...
-    ) -> None: ...
-    @property
-    def value(self) -> Any: ...
-
-class _NotSetType:
-    def __repr__(self) -> str: ...
-    @property
-    def value(self) -> Any: ...
-
-NotSet: _NotSetType
-
-T = TypeVar("T")
-
-OptionallySet = Union[T, _NotSetType]
-
-class _ValuedAttribute:
-    def __init__(self, value: Any) -> None: ...
diff --git a/github/RepositoryAdvisory.py b/github/RepositoryAdvisory.py
index 84a563b9..459ff493 100644
--- a/github/RepositoryAdvisory.py
+++ b/github/RepositoryAdvisory.py
@@ -326,24 +326,22 @@ class RepositoryAdvisory(github.GithubObject.NonCompletableGithubObject):
 
     def edit(
         self,
-        summary: github.GithubObject.OptionallySet[str] = github.GithubObject.NotSet,
-        description: github.GithubObject.OptionallySet[
+        summary: github.GithubObject.Opt[str] = github.GithubObject.NotSet,
+        description: github.GithubObject.Opt[str] = github.GithubObject.NotSet,
+        severity_or_cvss_vector_string: github.GithubObject.Opt[
             str
         ] = github.GithubObject.NotSet,
-        severity_or_cvss_vector_string: github.GithubObject.OptionallySet[
-            str
-        ] = github.GithubObject.NotSet,
-        cve_id: github.GithubObject.OptionallySet[str] = github.GithubObject.NotSet,
-        vulnerabilities: github.GithubObject.OptionallySet[
+        cve_id: github.GithubObject.Opt[str] = github.GithubObject.NotSet,
+        vulnerabilities: github.GithubObject.Opt[
             typing.Iterable[AdvisoryVulnerability]
         ] = github.GithubObject.NotSet,
-        cwe_ids: github.GithubObject.OptionallySet[
+        cwe_ids: github.GithubObject.Opt[
             typing.Iterable[str]
         ] = github.GithubObject.NotSet,
-        credits: github.GithubObject.OptionallySet[
+        credits: github.GithubObject.Opt[
             typing.Iterable[Credit]
         ] = github.GithubObject.NotSet,
-        state: github.GithubObject.OptionallySet[str] = github.GithubObject.NotSet,
+        state: github.GithubObject.Opt[str] = github.GithubObject.NotSet,
     ) -> "RepositoryAdvisory":
         """
         :calls: `PATCH /repos/{owner}/{repo}/security-advisories/:advisory_id <https://docs.github.com/en/rest/security-advisories/repository-advisories>`_
diff --git a/github/Requester.py b/github/Requester.py
index b6ce0beb..0f1de722 100644
--- a/github/Requester.py
+++ b/github/Requester.py
@@ -50,6 +50,7 @@
 #                                                                              #
 ################################################################################
 
+import io
 import json
 import logging
 import mimetypes
@@ -57,39 +58,69 @@ import os
 import re
 import time
 import urllib
+import urllib.parse
 from io import IOBase
-from typing import Generic, Optional, TypeVar
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Dict,
+    Generic,
+    ItemsView,
+    List,
+    Optional,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+)
 
 import requests
+import requests.adapters
+from urllib3 import Retry
 
-from . import Consts, GithubException
+import github.Consts as Consts
+import github.GithubException as GithubException
+
+if TYPE_CHECKING:
+    from .AppAuthentication import AppAuthentication
+    from .Auth import Auth
+    from .GithubObject import GithubObject
+    from .InstallationAuthorization import InstallationAuthorization
+
+T = TypeVar("T")
+
+# For App authentication, time remaining before token expiration to request a new one
+ACCESS_TOKEN_REFRESH_THRESHOLD_SECONDS = 20
 
 
 class RequestsResponse:
     # mimic the httplib response object
-    def __init__(self, r):
+    def __init__(self, r: requests.Response):
         self.status = r.status_code
         self.headers = r.headers
         self.text = r.text
 
-    def getheaders(self):
+    def getheaders(self) -> ItemsView[str, str]:
         return self.headers.items()
 
-    def read(self):
+    def read(self) -> str:
         return self.text
 
 
 class HTTPSRequestsConnectionClass:
+    retry: Union[int, Retry]
+
     # mimic the httplib connection object
     def __init__(
         self,
         host,
-        port=None,
-        strict=False,
-        timeout=None,
-        retry=None,
-        pool_size=None,
-        **kwargs,
+        port: Optional[int] = None,
+        strict: bool = False,
+        timeout: Optional[int] = None,
+        retry: Optional[Union[int, Retry]] = None,
+        pool_size: Optional[int] = None,
+        **kwargs: Any,
     ):
         self.port = port if port else 443
         self.host = host
@@ -115,13 +146,19 @@ class HTTPSRequestsConnectionClass:
         )
         self.session.mount("https://", self.adapter)
 
-    def request(self, verb, url, input, headers):
+    def request(
+        self,
+        verb: str,
+        url: str,
+        input: Optional[Union[str, io.BufferedReader]],
+        headers: Dict[str, str],
+    ):
         self.verb = verb
         self.url = url
         self.input = input
         self.headers = headers
 
-    def getresponse(self):
+    def getresponse(self) -> RequestsResponse:
         verb = getattr(self.session, self.verb.lower())
         url = f"{self.protocol}://{self.host}:{self.port}{self.url}"
         r = verb(
@@ -142,13 +179,13 @@ class HTTPRequestsConnectionClass:
     # mimic the httplib connection object
     def __init__(
         self,
-        host,
-        port=None,
-        strict=False,
-        timeout=None,
-        retry=None,
-        pool_size=None,
-        **kwargs,
+        host: str,
+        port: Optional[int] = None,
+        strict: bool = False,
+        timeout: Optional[int] = None,
+        retry: Optional[Union[int, Retry]] = None,
+        pool_size: Optional[int] = None,
+        **kwargs: Any,
     ):
         self.port = port if port else 80
         self.host = host
@@ -160,7 +197,7 @@ class HTTPRequestsConnectionClass:
         if retry is None:
             self.retry = requests.adapters.DEFAULT_RETRIES
         else:
-            self.retry = retry
+            self.retry = retry  # type: ignore
 
         if pool_size is None:
             self.pool_size = requests.adapters.DEFAULT_POOLSIZE
@@ -174,13 +211,13 @@ class HTTPRequestsConnectionClass:
         )
         self.session.mount("http://", self.adapter)
 
-    def request(self, verb, url, input, headers):
+    def request(self, verb: str, url: str, input: None, headers: Dict[str, str]):
         self.verb = verb
         self.url = url
         self.input = input
         self.headers = headers
 
-    def getresponse(self):
+    def getresponse(self) -> RequestsResponse:
         verb = getattr(self.session, self.verb.lower())
         url = f"{self.protocol}://{self.host}:{self.port}{self.url}"
         r = verb(
@@ -193,25 +230,34 @@ class HTTPRequestsConnectionClass:
         )
         return RequestsResponse(r)
 
-    def close(self):
+    def close(self) -> None:
         return
 
 
 class Requester:
+    __installation_authorization: Optional["InstallationAuthorization"]
+    __app_auth: Optional["AppAuthentication"]
+
     __httpConnectionClass = HTTPRequestsConnectionClass
     __httpsConnectionClass = HTTPSRequestsConnectionClass
     __connection = None
     __persist = True
     __logger = None
 
+    _frameBuffer: List[Any]
+
     @classmethod
-    def injectConnectionClasses(cls, httpConnectionClass, httpsConnectionClass):
+    def injectConnectionClasses(
+        cls,
+        httpConnectionClass: Type[HTTPRequestsConnectionClass],
+        httpsConnectionClass: Type[HTTPSRequestsConnectionClass],
+    ):
         cls.__persist = False
         cls.__httpConnectionClass = httpConnectionClass
         cls.__httpsConnectionClass = httpsConnectionClass
 
     @classmethod
-    def resetConnectionClasses(cls):
+    def resetConnectionClasses(cls) -> None:
         cls.__persist = True
         cls.__httpConnectionClass = HTTPRequestsConnectionClass
         cls.__httpsConnectionClass = HTTPSRequestsConnectionClass
@@ -227,11 +273,11 @@ class Requester:
     #############################################################
     # For Debug
     @classmethod
-    def setDebugFlag(cls, flag):
+    def setDebugFlag(cls, flag: bool) -> None:
         cls.DEBUG_FLAG = flag
 
     @classmethod
-    def setOnCheckMe(cls, onCheckMe):
+    def setOnCheckMe(cls, onCheckMe: Callable) -> None:
         cls.ON_CHECK_ME = onCheckMe
 
     DEBUG_FLAG = False
@@ -240,9 +286,9 @@ class Requester:
 
     DEBUG_HEADER_KEY = "DEBUG_FRAME"
 
-    ON_CHECK_ME = None
+    ON_CHECK_ME: Optional[Callable] = None
 
-    def NEW_DEBUG_FRAME(self, requestHeader):
+    def NEW_DEBUG_FRAME(self, requestHeader: Dict[str, str]) -> None:
         """
         Initialize a debug frame with requestHeader
         Frame count is updated and will be attached to respond header
@@ -260,7 +306,9 @@ class Requester:
 
             self._frameCount = len(self._frameBuffer) - 1
 
-    def DEBUG_ON_RESPONSE(self, statusCode, responseHeader, data):
+    def DEBUG_ON_RESPONSE(
+        self, statusCode: int, responseHeader: Dict[str, Union[str, int]], data: str
+    ):
         """
         Update current frame with response
         Current frame index will be attached to responseHeader
@@ -273,14 +321,14 @@ class Requester:
             ]
             responseHeader[self.DEBUG_HEADER_KEY] = self._frameCount
 
-    def check_me(self, obj):
+    def check_me(self, obj: "GithubObject"):
         if (
             self.DEBUG_FLAG and self.ON_CHECK_ME is not None
         ):  # pragma no branch (Flag always set in tests)
             frame = None
             if self.DEBUG_HEADER_KEY in obj._headers:
                 frame_index = obj._headers[self.DEBUG_HEADER_KEY]
-                frame = self._frameBuffer[frame_index]
+                frame = self._frameBuffer[frame_index]  # type: ignore
             self.ON_CHECK_ME(obj, frame)
 
     def _initializeDebugFeature(self):
@@ -289,16 +337,23 @@ class Requester:
 
     #############################################################
 
+    _frameCount: int
+    __connectionClass: Union[
+        Type[HTTPRequestsConnectionClass], Type[HTTPSRequestsConnectionClass]
+    ]
+    __hostname: str
+    __authorizationHeader: Optional[str]
+
     def __init__(
         self,
-        auth,
-        base_url,
-        timeout,
-        user_agent,
-        per_page,
-        verify,
-        retry,
-        pool_size,
+        auth: Optional["Auth"],
+        base_url: str,
+        timeout: int,
+        user_agent: str,
+        per_page: int,
+        verify: bool,
+        retry: Optional[Union[int, Retry]],
+        pool_size: Optional[int],
     ):
         self._initializeDebugFeature()
 
@@ -306,7 +361,7 @@ class Requester:
         self.__base_url = base_url
 
         o = urllib.parse.urlparse(base_url)
-        self.__hostname = o.hostname
+        self.__hostname = o.hostname  # type: ignore
         self.__port = o.port
         self.__prefix = o.path
         self.__timeout = timeout
@@ -340,14 +395,14 @@ class Requester:
             self.__auth.withRequester(self)
 
     @property
-    def base_url(self):
+    def base_url(self) -> str:
         return self.__base_url
 
     @property
-    def auth(self):
+    def auth(self) -> Optional["Auth"]:
         return self.__auth
 
-    def withAuth(self, auth):
+    def withAuth(self, auth: Optional["Auth"]) -> "Requester":
         """
         Create a new requester instance with identical configuration but the given authentication method.
         :param auth: authentication method
@@ -364,7 +419,14 @@ class Requester:
             pool_size=self.__pool_size,
         )
 
-    def requestJsonAndCheck(self, verb, url, parameters=None, headers=None, input=None):
+    def requestJsonAndCheck(
+        self,
+        verb: str,
+        url: str,
+        parameters: Optional[Dict[str, Any]] = None,
+        headers: Optional[Dict[str, str]] = None,
+        input: Optional[Any] = None,
+    ) -> Tuple[Dict[str, Any], Optional[Dict[str, Any]]]:
         return self.__check(
             *self.requestJson(
                 verb, url, parameters, headers, input, self.__customConnection(url)
@@ -372,29 +434,53 @@ class Requester:
         )
 
     def requestMultipartAndCheck(
-        self, verb, url, parameters=None, headers=None, input=None
-    ):
+        self,
+        verb: str,
+        url: str,
+        parameters: Optional[Dict[str, Any]] = None,
+        headers: Optional[Dict[str, Any]] = None,
+        input: Optional[Dict[str, str]] = None,
+    ) -> Tuple[Dict[str, Any], Optional[Dict[str, Any]]]:
         return self.__check(
             *self.requestMultipart(
                 verb, url, parameters, headers, input, self.__customConnection(url)
             )
         )
 
-    def requestBlobAndCheck(self, verb, url, parameters=None, headers=None, input=None):
+    def requestBlobAndCheck(
+        self,
+        verb: str,
+        url: str,
+        parameters: Optional[Dict[str, str]] = None,
+        headers: Optional[Dict[str, str]] = None,
+        input: Optional[str] = None,
+        cnx: Optional[
+            Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]
+        ] = None,
+    ) -> Tuple[Dict[str, Any], Dict[str, Any]]:
         return self.__check(
             *self.requestBlob(
                 verb, url, parameters, headers, input, self.__customConnection(url)
             )
         )
 
-    def __check(self, status, responseHeaders, output):
-        output = self.__structuredFromJson(output)
+    def __check(
+        self,
+        status: int,
+        responseHeaders: Dict[str, Any],
+        output: str,
+    ) -> Tuple[Dict[str, Any], Dict[str, Any]]:
+        data = self.__structuredFromJson(output)
         if status >= 400:
-            raise self.__createException(status, responseHeaders, output)
-        return responseHeaders, output
+            raise self.__createException(status, responseHeaders, data)
+        return responseHeaders, data
 
-    def __customConnection(self, url):
-        cnx = None
+    def __customConnection(
+        self, url: str
+    ) -> Optional[Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]]:
+        cnx: Optional[
+            Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]
+        ] = None
         if not url.startswith("/"):
             o = urllib.parse.urlparse(url)
             if (
@@ -407,7 +493,7 @@ class Requester:
             ):  # issue80
                 if o.scheme == "http":
                     cnx = self.__httpConnectionClass(
-                        o.hostname,
+                        o.hostname,  # type: ignore
                         o.port,
                         retry=self.__retry,
                         pool_size=self.__pool_size,
@@ -421,9 +507,15 @@ class Requester:
                     )
         return cnx
 
-    def __createException(self, status, headers, output):
+    def __createException(
+        self,
+        status: int,
+        headers: Dict[str, Any],
+        output: Dict[str, Any],
+    ) -> Any:
         message = output.get("message", "").lower() if output is not None else ""
 
+        cls = GithubException.GithubException
         if status == 401 and message == "bad credentials":
             cls = GithubException.BadCredentialsException
         elif (
@@ -443,11 +535,10 @@ class Requester:
             cls = GithubException.RateLimitExceededException
         elif status == 404 and message == "not found":
             cls = GithubException.UnknownObjectException
-        else:
-            cls = GithubException.GithubException
+
         return cls(status, output, headers)
 
-    def __structuredFromJson(self, data):
+    def __structuredFromJson(self, data: str) -> Any:
         if len(data) == 0:
             return None
         else:
@@ -461,16 +552,32 @@ class Requester:
                 return {"data": data}
 
     def requestJson(
-        self, verb, url, parameters=None, headers=None, input=None, cnx=None
-    ):
+        self,
+        verb: str,
+        url: str,
+        parameters: Optional[Dict[str, Any]] = None,
+        headers: Optional[Dict[str, Any]] = None,
+        input: Optional[Any] = None,
+        cnx: Optional[
+            Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]
+        ] = None,
+    ) -> Tuple[int, Dict[str, Any], str]:
         def encode(input):
             return "application/json", json.dumps(input)
 
         return self.__requestEncode(cnx, verb, url, parameters, headers, input, encode)
 
     def requestMultipart(
-        self, verb, url, parameters=None, headers=None, input=None, cnx=None
-    ):
+        self,
+        verb: str,
+        url: str,
+        parameters: Optional[Dict[str, Any]] = None,
+        headers: Optional[Dict[str, Any]] = None,
+        input: Optional[Dict[str, str]] = None,
+        cnx: Optional[
+            Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]
+        ] = None,
+    ) -> Tuple[int, Dict[str, Any], str]:
         def encode(input):
             boundary = "----------------------------3c3ba8b523b2"
             eol = "\r\n"
@@ -486,12 +593,25 @@ class Requester:
 
         return self.__requestEncode(cnx, verb, url, parameters, headers, input, encode)
 
-    def requestBlob(self, verb, url, parameters={}, headers={}, input=None, cnx=None):
-        def encode(local_path):
-            if "Content-Type" in headers:
-                mime_type = headers["Content-Type"]
+    def requestBlob(
+        self,
+        verb: str,
+        url: str,
+        parameters: Optional[Dict[str, str]] = None,
+        headers: Optional[Dict[str, str]] = None,
+        input: Optional[str] = None,
+        cnx: Optional[
+            Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]
+        ] = None,
+    ) -> Tuple[int, Dict[str, Any], str]:
+        if headers is None:
+            headers = {}
+
+        def encode(local_path: str):
+            if "Content-Type" in headers:  # type: ignore
+                mime_type = headers["Content-Type"]  # type: ignore
             else:
-                guessed_type = mimetypes.guess_type(input)
+                guessed_type = mimetypes.guess_type(local_path)
                 mime_type = (
                     guessed_type[0]
                     if guessed_type[0] is not None
@@ -520,13 +640,20 @@ class Requester:
         )
 
     def __requestEncode(
-        self, cnx, verb, url, parameters, requestHeaders, input, encode
-    ):
+        self,
+        cnx: Optional[Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]],
+        verb: str,
+        url: str,
+        parameters: Optional[Dict[str, str]],
+        requestHeaders: Optional[Dict[str, str]],
+        input: Optional[T],
+        encode: Callable[[T], Tuple[str, Any]],
+    ) -> Tuple[int, Dict[str, Any], str]:
         assert verb in ["HEAD", "GET", "POST", "PATCH", "PUT", "DELETE"]
         if parameters is None:
-            parameters = dict()
+            parameters = {}
         if requestHeaders is None:
-            requestHeaders = dict()
+            requestHeaders = {}
 
         if self.__auth is not None:
             requestHeaders[
@@ -565,7 +692,14 @@ class Requester:
 
         return status, responseHeaders, output
 
-    def __requestRaw(self, cnx, verb, url, requestHeaders, input):
+    def __requestRaw(
+        self,
+        cnx: Optional[Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]],
+        verb: str,
+        url: str,
+        requestHeaders: Dict[str, str],
+        input: Optional[Any],
+    ) -> Tuple[int, Dict[str, Any], str]:
         original_cnx = cnx
         if cnx is None:
             cnx = self.__createConnection()
@@ -618,7 +752,7 @@ class Requester:
 
         return status, responseHeaders, output
 
-    def __makeAbsoluteUrl(self, url):
+    def __makeAbsoluteUrl(self, url: str) -> str:
         # URLs generated locally will be relative to __base_url
         # URLs returned from the server will start with __base_url
         if url.startswith("/"):
@@ -638,17 +772,19 @@ class Requester:
                 url += f"?{o.query}"
         return url
 
-    def __addParametersToUrl(self, url, parameters):
+    def __addParametersToUrl(
+        self,
+        url: str,
+        parameters: Dict[str, Any],
+    ):
         if len(parameters) == 0:
             return url
         else:
             return f"{url}?{urllib.parse.urlencode(parameters)}"
 
-    def __createConnection(self):
-        kwds = {}
-        kwds["timeout"] = self.__timeout
-        kwds["verify"] = self.__verify
-
+    def __createConnection(
+        self,
+    ) -> Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]:
         if self.__persist and self.__connection is not None:
             return self.__connection
 
@@ -657,18 +793,28 @@ class Requester:
             self.__port,
             retry=self.__retry,
             pool_size=self.__pool_size,
-            **kwds,
+            timeout=self.__timeout,
+            verify=self.__verify,
         )
 
         return self.__connection
 
     @property
-    def _logger(self):
+    def _logger(self) -> logging.Logger:
         if self.__logger is None:
             self.__logger = logging.getLogger(__name__)
         return self.__logger
 
-    def __log(self, verb, url, requestHeaders, input, status, responseHeaders, output):
+    def __log(
+        self,
+        verb: str,
+        url: str,
+        requestHeaders: Dict[str, str],
+        input: Optional[Any],
+        status: Optional[int],
+        responseHeaders: Dict[str, Any],
+        output: Optional[str],
+    ) -> None:
         if self._logger.isEnabledFor(logging.DEBUG):
             headersForRequest = requestHeaders.copy()
             if "Authorization" in requestHeaders:
@@ -698,14 +844,13 @@ class Requester:
             )
 
 
-T = TypeVar("T")
-
-
 class WithRequester(Generic[T]):
     """
     Mixin class that allows to set a requester.
     """
 
+    __requester: Requester
+
     def __init__(self):
         self.__requester: Optional[Requester] = None
 
@@ -713,7 +858,7 @@ class WithRequester(Generic[T]):
     def requester(self) -> Requester:
         return self.__requester
 
-    def withRequester(self, requester: Requester) -> T:
+    def withRequester(self, requester: Requester) -> "WithRequester[T]":
         assert isinstance(requester, Requester), requester
         self.__requester = requester
         return self
diff --git a/github/Requester.pyi b/github/Requester.pyi
deleted file mode 100644
index 9d381816..00000000
--- a/github/Requester.pyi
+++ /dev/null
@@ -1,232 +0,0 @@
-from collections import OrderedDict
-from io import BufferedReader
-from logging import Logger
-from typing import (
-    Any,
-    Callable,
-    Dict,
-    Iterator,
-    Optional,
-    Tuple,
-    Union,
-    Generic,
-    TypeVar,
-)
-
-from requests.models import Response
-from urllib3.util import Retry
-
-from github.Auth import Auth
-from github.GithubObject import GithubObject
-from github.InstallationAuthorization import InstallationAuthorization
-
-class HTTPRequestsConnectionClass:
-    def __init__(
-        self,
-        host: str,
-        port: Optional[int] = ...,
-        strict: bool = ...,
-        timeout: Optional[int] = ...,
-        retry: Optional[Union[int, Retry]] = ...,
-        pool_size: Optional[int] = ...,
-        **kwargs: str
-    ) -> None: ...
-    def close(self) -> None: ...
-    def getresponse(self) -> RequestsResponse: ...
-    def request(
-        self, verb: str, url: str, input: None, headers: Dict[str, str]
-    ) -> None: ...
-
-class HTTPSRequestsConnectionClass:
-    def __init__(
-        self,
-        host: str,
-        port: Optional[int] = ...,
-        strict: bool = ...,
-        timeout: Optional[int] = ...,
-        retry: Optional[Union[int, Retry]] = ...,
-        pool_size: Optional[int] = ...,
-        **kwargs: str
-    ) -> None: ...
-    def close(self) -> None: ...
-    def getresponse(self) -> RequestsResponse: ...
-    def request(
-        self,
-        verb: str,
-        url: str,
-        input: Optional[Union[str, BufferedReader]],
-        headers: Dict[str, str],
-    ) -> None: ...
-
-class Requester:
-    __auth: Optional[Auth] = ...
-    __installation_authorization: Optional[InstallationAuthorization] = ...
-    __logger: Logger
-    def DEBUG_ON_RESPONSE(
-        self, statusCode: int, responseHeader: Dict[str, str], data: str
-    ) -> None: ...
-    def NEW_DEBUG_FRAME(self, requestHeader: Dict[str, str]) -> None: ...
-    def __check(
-        self,
-        status: int,
-        responseHeaders: Dict[str, Any],
-        output: str,
-    ) -> Tuple[Dict[str, Any], Dict[str, Any]]: ...
-    def __addParametersToUrl(
-        self,
-        url: str,
-        parameters: Dict[str, Any],
-    ) -> str: ...
-    def __authenticate(
-        self,
-        url: str,
-        requestHeaders: Dict[str, Any],
-        parameters: Dict[str, Any],
-    ) -> None: ...
-    def __customConnection(
-        self,
-        url: str,
-    ) -> Optional[Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]]: ...
-    def __createConnection(
-        self,
-    ) -> Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]: ...
-    def __createException(
-        self,
-        status: int,
-        headers: Dict[str, Any],
-        output: str,
-    ) -> Any: ...
-    @property
-    def _logger(self) -> Logger: ...
-    def __log(
-        self,
-        verb: str,
-        url: str,
-        requestHeaders: Dict[str, str],
-        input: Optional[str],
-        status: Optional[int],
-        responseHeaders: Dict[str, Any],
-        output: Optional[str],
-    ) -> None: ...
-    def __makeAbsoluteUrl(self, url: str) -> str: ...
-    def __structuredFromJson(self, data: str) -> Optional[Dict[str, Any]]: ...
-    def __requestEncode(
-        self,
-        cnx: Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass],
-        verb: str,
-        url: str,
-        parameters: Dict[str, str],
-        requestHeaders: Dict[str, str],
-        input: Optional[str],
-        encode: Callable[[str], str],
-    ) -> Tuple[int, Dict[str, Any], str]: ...
-    def __requestRaw(
-        self,
-        cnx: Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass],
-        verb: str,
-        url: str,
-        requestHeaders: Dict[str, str],
-        input: Optional[str],
-    ) -> Tuple[int, Dict[str, Any], str]: ...
-    def __init__(
-        self,
-        auth: Optional[Auth],
-        base_url: str,
-        timeout: int,
-        user_agent: str,
-        per_page: int,
-        verify: bool,
-        retry: Optional[Union[int, Retry]],
-        pool_size: Optional[int],
-    ) -> None: ...
-    @property
-    def base_url(self) -> str: ...
-    @property
-    def auth(self) -> Optional[Auth]: ...
-    def withAuth(self, auth: Optional[Auth]) -> Requester: ...
-    def _initializeDebugFeature(self) -> None: ...
-    def check_me(self, obj: GithubObject) -> None: ...
-    def _must_refresh_token(self) -> bool: ...
-    def _get_installation_authorization(self) -> InstallationAuthorization: ...
-    def _refresh_token_if_needed(self) -> None: ...
-    def _refresh_token(self) -> None: ...
-    @classmethod
-    def injectConnectionClasses(
-        cls, httpConnectionClass: Callable, httpsConnectionClass: Callable
-    ) -> None: ...
-    def requestBlob(
-        self,
-        verb: str,
-        url: str,
-        parameters: Dict[str, str] = ...,
-        headers: Dict[str, str] = ...,
-        input: Optional[str] = ...,
-        cnx: Optional[
-            Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]
-        ] = ...,
-    ) -> Tuple[int, Dict[str, Any], str]: ...
-    def requestBlobAndCheck(
-        self,
-        verb: str,
-        url: str,
-        parameters: Optional[Dict[str, Any]] = ...,
-        headers: Optional[Dict[str, Any]] = ...,
-        input: Optional[str] = ...,
-    ) -> Tuple[Dict[str, Any], Optional[Dict[str, Any]]]: ...
-    def requestJson(
-        self,
-        verb: str,
-        url: str,
-        parameters: Optional[Dict[str, Any]] = ...,
-        headers: Optional[Dict[str, Any]] = ...,
-        input: Optional[Any] = ...,
-        cnx: Optional[
-            Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]
-        ] = ...,
-    ) -> Tuple[int, Dict[str, Any], str]: ...
-    def requestJsonAndCheck(
-        self,
-        verb: str,
-        url: str,
-        parameters: Optional[Dict[str, Any]] = ...,
-        headers: Optional[Dict[str, str]] = ...,
-        input: Optional[Any] = ...,
-    ) -> Tuple[Dict[str, Any], Optional[Dict[str, Any]]]: ...
-    def requestMultipart(
-        self,
-        verb: str,
-        url: str,
-        parameters: Optional[Dict[str, Any]] = ...,
-        headers: Optional[Dict[str, Any]] = ...,
-        input: Optional[OrderedDict[str, str]] = ...,
-        cnx: Optional[
-            Union[HTTPRequestsConnectionClass, HTTPSRequestsConnectionClass]
-        ] = ...,
-    ) -> Tuple[int, Dict[str, Any], str]: ...
-    def requestMultipartAndCheck(
-        self,
-        verb: str,
-        url: str,
-        parameters: Optional[Dict[str, Any]] = ...,
-        headers: Optional[Dict[str, Any]] = ...,
-        input: Optional[OrderedDict[str, str]] = ...,
-    ) -> Tuple[Dict[str, Any], Optional[Dict[str, Any]]]: ...
-    @classmethod
-    def resetConnectionClasses(cls) -> None: ...
-    @classmethod
-    def setDebugFlag(cls, flag: bool) -> None: ...
-    @classmethod
-    def setOnCheckMe(cls, onCheckMe: Callable) -> None: ...
-
-T = TypeVar("T")
-
-class WithRequester(Generic[T]):
-    __requester: Optional[Requester]
-    @property
-    def requester(self) -> Requester: ...
-    def withRequester(self, requester: Requester) -> T: ...
-
-class RequestsResponse:
-    def __init__(self, r: Response) -> None: ...
-    def getheaders(self) -> Iterator[Any]: ...
-    def read(self) -> str: ...