Thread:Extension talk:GoogleAppsAuthentification/Error with auth request/reply

The variable 'GoogleAppsDomain' should have the domain you want to allow logins from. e.g. I only want google accounts with domain example.com to login, such as mom@example.com or dad@example.com:

$wgDefaultUserOptions['GoogleAppsDomain'] = 'example.com';

This way, jimmy@gmail.com won't be authenticated.