/**
  * Allows you to hook into AuthComponent::logout(),
  * and implement specialized logout behavior.
  *
  * All attached authentication objects will have this method
  * called when a user logs out.
  *
  * @param array $user The user about to be logged out.
  * @return void The return value from this method isn't checked by AuthComponent::logout().
  */
 public function logout($user)
 {
     return $this->UserModel->logout($user);
 }