Identify which Omniauth provider you want to integrate with.
Setup Devise for omniauth
- enablingthe omniauthable module on your user model
- creating a migration to store provider/uid
- setting up accounts
- integrating with the service through your config/initializers/devise.rb
https://github.com/intridea/omniauth https://github.com/intridea/omniauth/wiki/List-of-Strategies https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview
https://github.com/intridea/omniauth/wiki/External-Resources