Looking for logging into the Facebook Devise site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Facebook Devise site. After that you can login as usual with your login credentials.
https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview
https://medium.com/%40trydelight/facebook-authentication-with-devise-5b53d2f664ed
https://medium.com/%40chinnatiptaemkaeo/integrate-omniauth-facebook-to-rails-5-1389d760d92a
https://revs.runtime-revolution.com/working-with-facebook-using-devise-omniauth-koala-and-rails-5-cde5d032de02
https://stackoverflow.com/questions/42280622/devise-omniauth-facebook-rememberable
https://stackoverflow.com/questions/23140591/facebook-login-devise%3Frq%3D1
https://sourcey.com/articles/rails-omniauth-using-devise-with-twitter-facebook-and-linkedin
https://www.youtube.com/watch%3Fv%3Dv-ef-fOmt5A
https://onebitcode.com/criando-autenticacao-com-o-facebook-em-10-minutos-devise-omniauth/
https://dev.mikamai.com/2017/06/06/devise-facebook-omniauth-login-with-connect-and-disconnect-functionality/
https://scotch.io/tutorials/integrating-social-login-in-a-ruby-on-rails-application
https://www.adrianprieto.com/how-to-setup-devise-and-omniauth-for-your-rails-application/
https://quickrails.com/login-with-multiple-providers-devise-via-omniauth/