diff --git a/src/cli/discourse.js b/src/cli/discourse.js
index c8cc00c..805703e 100644
--- a/src/cli/discourse.js
+++ b/src/cli/discourse.js
@@ -78,15 +78,11 @@ const command: Command = async (args, std) => {
     return die(std, "Expected one positional arguments (or --help).");
   }
   const [serverUrl] = positionalArgs;
-  let projectId = serverUrl;
-  if (projectId.startsWith("https://")) {
-    projectId = projectId.slice("https://".length);
-  } else if (projectId.startsWith("http://")) {
-    projectId = projectId.slice("http://".length);
-  } else {
+  const httpRE = new RegExp(/^https?:\/\//);
+  if (!httpRE.test(serverUrl)) {
     die(std, "expected server url to start with 'https://' or 'http://'");
   }
-
+  const projectId = serverUrl.trim().replace(httpRE, "");
   const project: Project = {
     id: projectId,
     repoIds: [],
diff --git a/src/cli/genProject.js b/src/cli/genProject.js
index 806cb28..3d48bd3 100644
--- a/src/cli/genProject.js
+++ b/src/cli/genProject.js
@@ -20,7 +20,6 @@ function usage(print: (string) => void): void {
     usage: sourcecred gen-project PROJECT_ID
                                   [--github GITHUB_SPEC [...]]
                                   [--discourse-url DISCOURSE_URL]
-                                  [--discourse-username DISCOURSE_USERNAME]
            sourcecred gen-project --help
 
     Generates a SourceCred project configuration based on the provided specs.