RFC: AccountsJS + Oauth + Packages + Docs

[agustif]

@nsine was kind enough to share his work implementing Google oauth with Accounts on #961
Also related to: #1026 #875

I want to continue @nsine's work in order to complete as much as possible the AccountsJS oauth ecosystem and docs.

This PR adds very rough example of how to use accounts-js OAuth to login/register with Google.
Opening it (as a draft, as don't have too much time atm to polish it) mostly because @agustif asked some help on this and may be can be useful for others.

Feel free to pick this up and implement complete example if someone has time/motivation. This can serve as a good base to start from 🙂.
What has to be done from my PoV to add this as an official example:

• make nice styling
• Add other examples apart from google (e.g. OOTB twitter, instagram)
• Add error handling
• Add some readme to oauth package and reference
• Add page where we can link oauth providers to existing accounts (afaik @agustif already tried to do sth like this)

To make this work:

• fill examples/react-rest-typescript/.env.development with valid google client id and callback url
• create .env file in examples/rest-express-typescript folder with variables from .env.example in same folder

Hope that helps!

Oauth adapters

• Instagram (Already on packages)
• Twitter (Already on packages)
• Google by @nsine
• Facebook by @agustif
• NextCloud by @tennox
• GitHub

Oauth example

@nsine extended the rest examples, should I continue this and push to the rest examples adding oauth, or fork with a new example folders for oauth cllient and server?

Also planning on doing GraphQL too, I think @nsine uses it and can help me if needed!

Please comment!

This is a request for comments, so any feedback idea will be greatly appreciated.

[pradel]

@agustif I think that adding it to the current rest example is the easiest way for now :)

[tennox]

@agustif @nsine Ready for review: #1080

😎