Name Switching Bug
I changed my name to DustyGamma. As a result I get doubled results and authentication errors. The double results consist of me getting notifications to pick repositories and then notifications for the respositories I have setup.
Mark as a feature request as I will attempt to delete the duplicates myself.
We don't have any code to explicitly handle the case of changing user names. The user API has an "id" which looks like it's unique: https://developer.github.com/v3/users/ we could use this
This indicates: http://stackoverflow.com/questions/11976393/get-github-username-by-id that the username is the unique key. The fix could be to check that the id still equals the username, but it might be better just to document it or create a page to switch usernames.