Merge pull request #3720 from fidelcoria/custom-github-auth

chore(auth): customizable github auth storage key

.changeset/sour-badgers-cry.md

@@ -0,0 +1,5 @@
+---
+'@backstage/core-api': patch
+---
+
+GitHub Auth Api uses provider.id to build storage key name.

packages/core-api/src/apis/implementations/auth/github/GithubAuth.ts

@@ -84,7 +84,7 @@ class GithubAuth implements OAuthApi, SessionApi {
 
     const authSessionStore = new AuthSessionStore<GithubSession>({
       manager: sessionManager,
-      storageKey: 'githubSession',
+      storageKey: `${provider.id}Session`,
       sessionScopes: (session: GithubSession) => session.providerInfo.scopes,
     });