python 3.9 does not like the pipe style optional arg types

src/spiffworkflow_backend/routes/process_api_blueprint.py

@@ -1088,7 +1088,7 @@ def get_spiff_task_from_process_instance(
 #
 # Methods for secrets CRUD - maybe move somewhere else:
 #
-def get_secret(key: str) -> str | None:
+def get_secret(key: str) -> Optional[str]:
     """Get_secret."""
     return SecretService.get_secret(key)
 

src/spiffworkflow_backend/services/secret_service.py

@@ -54,7 +54,7 @@ class SecretService:
         return secret_model
 
     @staticmethod
-    def get_secret(key: str) -> str | None:
+    def get_secret(key: str) -> Optional[str]:
         """Get_secret."""
         secret: SecretModel = (
             db.session.query(SecretModel).filter(SecretModel.key == key).first()