Re:Things to Know When Making a Web Application in 2015
by cpitman on Saturday July 11, 2015 @02:00AM
(#9868721)
GitHub How To: https://developer.github.com/guides/basics-of-authentication...
And the OpenID Connect standard (essentially OAuth V2 + identity service): http://openid.net/connect/
Login with FB, Google, Github, Twitter, etc different systems, separate from OAuth.