AUTH_FAIL_AND_STOP
AUTH_FAIL_AND_STOP = -1
Google Authenticator Service
The Google Authenticator Service handles backend login requests. When a user tries to log in, this service checks wether the user has enabled the Google Authenticator. If so, the given code (if any) is validated against the stored secret and on success, the user can proceed. If the user has not enabled the Google Authenticator, the login request is delegated to the default authentication service.