Until now, we had a lot of code. Although we were using a plugin to help with boilerplate code, ready endpoints, and webpages for sign in/sign up management, a lot of adaptations were necessary. This is when Doorkeeper comes to the rescue. It is not only an OAuth 2 provider for Rails but also a full OAuth 2 suite for Ruby and related frameworks (Sinatra, Devise, MongoDB, support for JWT, and more).

We want to use the Doorkeeper gem to implement an OAuth provider in our app. However, we use 2 factor auth in the login process, so we need a way to modify the password grant to accept email, password and a 2fa token (and respond with an appropriate error if the 2fa token is required and missing).

Reuses OmniAuth strategy implementation, such as facebook or google

is there a more official way to deal hook in OmniAuth so we can authenticate with Facebook, Twitter, or Google?