symfony - FOSUserBundle authenticate selected user -

i authenticate user in direct way (fosuserbundle, symfony2.2). i'am trying trivial example, doesn't work:

... use fos\userbundle\controller\registrationcontroller regcontroller; ... class defaultcontroller extends controller{ ... public function indexaction(){ $route = 'first_set_profile'; $url = $this->container->get('router')->generate($route); $response = new redirectresponse($url); $usermanager = $this->get('fos_user.user_manager'); $usertologin = $usermanager->finduserbyemail('aa@bb.com'); new regcontroller(authenticateuser($usertologin, $response)); ... } 

this script running, not authenticate user email aa@bb.com...

thanks

this how can authenticate demo user example programmatic:

use symfony\component\security\core\authentication\token\usernamepasswordtoken;  public function demologinaction(request $request) {     $usermanager = $this->get('fos_user.user_manager');     $user = $usermanager->finduserbyemail('demo@example.com');      if (!$user) {         throw $this->createnotfoundexception('no demouser found!');     }      $token = new usernamepasswordtoken($user, $user->getpassword(), 'main', $user->getroles());      $context = $this->get('security.context');     $context->settoken($token);      $router = $this->get('router');     $url = $router->generate('dashboard_show');      return $this->redirect($url); } 

the third parameter in usernamepasswordtoken must firewall name.