Fix the redirect

Need to attempt to resume session to know whether we are authenticated.

Author: dhh

railties/lib/rails/generators/rails/sessions/templates/controllers/sessions_controller.rb

@@ -3,7 +3,13 @@ class SessionsController < ApplicationController
   rate_limit to: 10, within: 3.minutes, only: :create, with: -> { redirect_to new_session_url, alert: "Try again later." }
 
   def new
-    redirect_to root_url if authenticated?
+    resume_session
+
+    if authenticated?
+      redirect_to root_url
+    else
+      render
+    end
   end
 
   def create