<%= link_to 'Main app', main_app.root_path %> <% if !user_signed_in? %> <%= link_to 'Sign Up', new_user_path %> <%= link_to 'Log In', new_session_path %> <% end %> <% if user_signed_in? %> <%= link_to 'Log Out', session_path(current_user), data: {confirm: "Are you sure?" }, method: :delete %> <% end %>