public function handle(FormInterface $form, Request $request)
 {
     $form->handleRequest($request);
     if (!$form->isValid()) {
         return false;
     }
     $entity = $form->getData();
     $entity->setPassword(null);
     $this->userManager->changePassword($entity);
     $this->flashBag->add(FlashBagEvents::MESSAGE_TYPE_SUCCESS, $this->translator->trans('security.change_password.success'));
     return true;
 }