FacebookRestClient::users_getLoggedInUser PHP Method

    public function users_getLoggedInUser()
    {
        return $this->call_method('facebook.users.getLoggedInUser', array());
    }

 /** 
 	int  fb_sig_user  The uid of the person who is uninstalling your application (e.g. 609143784)  
 	string  fb_sig_session_key  The session_key originally given to your application for the user who is uninstalling the application. This parameter did not appear in the latest requests.  
 	string  fb_sig_api_key  The api_key of your application that is being uninstalled.  
 	int  fb_sig_added  n/a  
 	string  fb_sig  
 */
 private function getContext(FacebookRestClient $client, RingsideSocialSession $network_session)
 {
     $api_key = $client->api_key;
     $session_key = $client->session_key;
     $uid = $client->users_getLoggedInUser();
     $social_session_key = $network_session->getSessionKey();
     $names = $client->users_getInfo($uid, "first_name");
     $name = $names[0];
     $user_name = trim($name['first_name']);
     return "fb_sig_user={$uid}&user_name={$user_name}&fb_sig_api_key={$api_key}&fb_sig_session_key={$session_key}&social_session_key={$social_session_key}";
 }