Is it possible to have a single login page that **both** Customer Portal and Communities users can login with? We are in the process of transitioning users from Customer Portal to Communities. We would like to allow everyone to continue to login using the same URL they were perviously using to access Customer Portal. When they get transitioned to Communities (different profile), they would be automatically redirected to the new communities instead of customer portal.

Not sure if this is possible as Customer Portal uses the `Site.Login()` method and communities uses `Network.forwardToAuthPage()`. Wondering if anyone has run into a similar use-case and how you might have solved it.