/**
  * @param User $user
  * @return \Symfony\Component\HttpFoundation\RedirectResponse
  * @Security("has_role('ROLE_ADMIN')")
  */
 public function activateAction(User $user)
 {
     if ($user->getEnabled() == true) {
         $user->setEnabled(false);
     } else {
         $user->setEnabled(true);
     }
     $em = $this->getDoctrine()->getManager();
     $em->flush();
     return $this->redirectToRoute('troiswa_back_user');
 }