https://www.bootrails.com/blog/ruby-on-rails-authentication-tutorial-with-devise/ <div> <% if user_signed_in? %> Logged in as <strong><%= current_user.email %></strong>. <%= link_to "Logout", destroy_user_session_path, method: :delete, :class => 'navbar-link' %> <% else %> <%= link_to "Sign up", new_user_registration_path, :class => 'navbar-link' %> | <%= link_to "Sign in", new_user_session_path, :class => 'navbar-link' %> <% end %> </div>