Build RESTful API for social network login

I put a RESTful API on top of Facebook, Google, Linkedin to abstract our server and app can share a common login flow infrastructure.

(1) In this project we also send the user authentication keys by Http header.

(2) I used Facebook, Google, and Linkedin with RESTful APIs to add social network login to the backend of a website and an app. Linkedin API requests a different format, so integrating its social network login flow with Google and Facebook requires an additional layer of abstraction.