Sorry to hear that :( I'm also one of the devs. If you are still having issues with authenticating you can check out a video and description about our service at http://nodeknockout.com/teams/team-name-goes-here

Hi! I'm one of the developers of Hub. We've been having some issues with GitHub rate limiting, but that should have reset now, so if you still want to try it out, it should work for you now. :)