If you ever want to integrate real-time video chat as well, send us a note at vLine: https://vline.com. We actually have what we call a "GitHub identity provider" (https://vline.com/developer/docs/getting_started) that should make it really easy.

We used that to build GitTogether (https://gittogether.com), which is a similar concept to this: text chat and video chat with people you follow plus members of your teams and organizations.