Google Sign in usage
- the client ID can be changed in the 'Settings->System configuration->Google client ID for Google Sign in'
- the G button can be disabled in the 'Settings->System configuration->Don't display Google Sign in button'
- the Google account's email is used as a key in GUI's user list. So you need to create users in the GUI with the appropriate email and to use the 'Google Sign in' as an authorization engine. The user's permissions are used from the GUI's user setting.
- click on the G button an do auth