ASP.NET Web API 2 external logins with Facebook and Google in AngularJS app - Bit of Technology
Detailed post on enabling ASP.NET Web API 2 external logins such as Facebook & Google using Owin and Identity, then consume it in AngularJS app
Aug 11, 2014 ... In this post we'll add support to login using Facebook and Google+ external providers, then we'll associate those authenticated social accounts ...