OAuth2 support

[varunpathania86]

🚀 Feature Proposal

Login using OAuth2 authentication

Motivation

A lot of organizations are using OAuth2 authentication, which provides SSO (single sign-on) feature while switching to and from different applications. Having this feature in hospitalrun will provide an opportunity for hospitals to access hospitalrun application without sign-in multiple times.

Example

https://www.npmjs.com/package/simple-oauth2

[ikyman]

So I may be new to Open-Source, (and also React), but I'd like to see if I can deal with this.