Looking for logging into the With Multiple 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 With Multiple Devise site. After that you can login as usual with your login credentials.
https://github.com/plataformatec/devise/wiki/How-to-Setup-Multiple-Devise-User-Models
https://gorails.com/forum/devise-with-multiple-user-models-with-single-login-form
https://stackoverflow.com/questions/12532659/devise-single-sign-in-form-for-multiple-users
https://www.reddit.com/r/rails/comments/4a4m8z/single_sign_in_form_for_multiple_devise_models/
https://quickrails.com/login-with-multiple-providers-devise-via-omniauth/
http://lorefnon.me/2014/09/07/devise-multiple-emails.html
https://addstar34.github.io/rails-devise-multiple-users-with-1-model/
https://blog.kodius.io/devise-omniauth-multiple-models
https://discuss.emberjs.com/t/ember-authentication-with-multiple-devise-models/6229
http://excid3.com/blog/devise-username-authentication-with-multiple-models-and-subdomains
https://codepany.com/blog/rails-5-user-accounts-with-3-types-of-roles-devise-rails_admin-cancancan/
http://devise.plataformatec.com.br/
https://www.pluralsight.com/guides/implementing-a-custom-devise-sign-in-and-actioncable-rails-5