// If this instance is created then the username *does* exist
try {
// Get a new instance
- $userInstance = User::createUserByUsername($userName);
+ $userInstance = call_user_func_array(array($this->getConfigInstance()->readConfig('user_class'), "createUserByUsername"), array($userName));
// Remember this user instance in our registry for later usage
$registry->addInstance('user', $userInstance);