Google single sign-on (SSO) is enabled on both the front and back ends of the Regpack log-in page, allowing admins and users to use their Google accounts to sign-on to the system.
Back-End
Visit https://www.regpack.com/reg/admin/login/ —> click Sign in with Google —> log in with the Google account associated with your Regpack account. 
Front-End
This feature can be enabled or disabled on the front-end of each project by going to Forms —> System —> Edit Form Fields by the Create Account form —> click on the part of the Login/Register widget —> toggle the Disable Google Login setting ON/OFF. 