How can I login as an admin if Maestro login isn't active?

To access the admin login if your site is using another login source, add ?login=email at the end of your url. 

If the URL is www.live.maestro.com, adding ?login=email to the end of the URL (ex:www.live.maestro.com?login=email) will prompt the Maestro login to appear allowing you to log in to the page with your admin credentials.