With Community or Chameleon, the user has the ability to login using Sign in with Google
Enable Google Login
You need to:
Turn on the Google Login feature
Assign a Google Client ID (if not already assigned)
To enable Google Login in your instance of Chameleon, go to Configuration > Preferences > search Google > select "Google > Login" > change the value to TRUE > Update Now.
Assign Google Client ID
You may also need to create a Client ID for your IP address or domain if one is not already assigned. To do this follow these instructions: https://developers.google.com/identity/sign-in/web/devconsole-project
Add a User with a Google Login
In User control, Add User
Add user info.
Use a GMAIL email address
And be sure to select Google as your Login Method
Add New User Now
Editing Existing Users