vauth

https://github.com/radiantshaw/vauth-ruby

Contains a bunch of objects modled after the concepts from the OAuth 2.0 spec that can be stitched together to create an OAuth 2.0 flow that you want. This currently only supports the Authorization Code Grant as that's the only flow that I need for myself. But it will for sure include other flows in the future to make it a complete OAuth 2.0 end-to-end system.