bug: CODER_OAUTH2_GITHUB_ALLOWED_ORGS breaks first login via GitHub #17752

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

When setting CODER_OAUTH2_GITHUB_ALLOWED_ORGS on a fresh Coder deployment, the Coder deployment will try to check against the orgs list, but since the built-in Coder GitHub app does not set that permission, Coder will just think that you're not a member of the org.

(Discord Thread)

Relevant Log Output

Expected Behavior

Coder should ignore CODER_OAUTH2_GITHUB_ALLOWED_ORGS, or should be using the OAuth app with ID github (or the first with github type) if defined by the admin, or both.

Steps to Reproduce

1. Set CODER_OAUTH2_GITHUB_ALLOWED_ORGS to anything
2. Start a fresh Coder deployment
3. Try to log in

Environment

Coder v2.21.3+bd1ef88 (not in the video but I did check and it's the same.

Additional Context

This sometimes leaves the Coder deployment in a broken state when restarted (the deployment thinks it has a user but you can't use it).

The user that reported this got a different issue, but I believe the cause to be the same.