public function handle(Request $request, Response $response, array $config)
{
$session = new UserSession();
$query = "SELECT * from usersession";
var_dump($session->fetchAll($query));
}
/**
* Destroy the session and clear the user information.
*
* @return boolean
*/
public function clearIdentity()
{
UserSession::create()->delete(array('user_id' => $this->getUserId()));
Session::expireSessionCookie();
return true;
}