/**
  * Logouts the user
  * 
  * @param      myUser $userSf
  */
 public static function logout(myUser $userSf)
 {
     $user = PcUserPeer::retrieveByPk($userSf->getAttribute('userid'));
     $userSf->setAuthenticated(false);
     $userSf->setAttribute('userid', 0);
     $userSf->clearCredentials();
     // {{{ this should not be necessary...but just in case
     unset($_SESSION["symfony/user/sfUser/credentials"]);
     unset($_SESSION["symfony/user/sfUser/authenticated"]);
     // }}}
     self::resetRememberMeCookie();
     sfContext::getInstance()->getEventDispatcher()->notify(new sfEvent('customAuthLogout', 'custom_auth.logout', array('user' => $user)));
 }