public GenieGate_Api_User passiveLogin(
groups
array = array());Like login, without the prompt and without the exit.
Use this if you require a login that does not exit automatically.
This looks at the form variables for the username/password pair, checks the session, or inspects PHP_AUTH_USER for the credentials.
returns a GenieGate_Api_User representing the user,
or FALSE if it can't login. (such as invalid credentials)