Lavarel4：使用Oauth artdarek退出谷歌

I just start learning L4, begining with Oauth by Artdarek.

I can login using google but i cant find a way to logout by unset Session token or something like that. I already read document on github but just login, no logout example in there.

Tried Session::flush(); Auth::logout(); but it is not working.

Using the google logout url works fine but it is logging out all google web apps (gmail etc).

Is there a way to clear google session?

You can use following code to clear your google tokens:

$google = OAuth::consumer('Google');
$google->getStorage()->clearAllTokens();