Devise & OmniAuth Multiple Providers

Add and install the Devise gem

Create Controller users/omniauth_callbacks_controller.rb

Create Controller Concern omni_concern.rb

Add authentication_provider migration

Add user_authentication migration

Add Associations in authentication_provider.rb

Add the following code to user_authentication.rb

Add the following code to user.rb

Add Model Concern omniauth_attributes_concern.rb

Add route for users/omniauth_callbacks_controller.rb in routes.rb

Add Social Media Account Keys in devise.rb

Add Gems in Gemfile for OmniAuth