In short
Plug n’ play OAuth 2.0 provider library. Just set up a resource owner schema with Ecto (your user schema), install the dependency and run the install task. That’s it! 
ExOauth2Provider
PhoenixOauth2Provider
Background
This is my first full project in Elixir. The reason for building these hex libraries was that I needed a flexible plug n’ play OAuth 2.0 provider for a Phoenix project I’m working on. The other options I found didn’t cut it for me, and I was looking for something akin to Doorkeeper for Rails. Basically a no brainer library, that I can adjust after getting it up and running.
Use case
I wrote a blog post on how you can create a versioned API using OAuth 2.0 access tokens in minutes using this library: https://dreamconception.com/tech/phoenix-full-fledged-api-in-five-minutes/
I hope this can be useful for some of you. Please feel free to help improve the libraries with suggestions or PR’s!
