public function register(Request $request, UserPasswordEncoderInterface $passwordEncoder, \Swift_Mailer $mailer)
    {
        if ($this->isAuthenticated()) {
            return $this->redirect('panel');
        }

        $user = new User();
        $form = $this->createForm(RegisterForm::class, $user);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $password = $passwordEncoder->encodePassword($user, $form->get('password')->getData());
            $user->setPassword($password);
            $this->save($user);
            $this->container->get('security.token_storage')->setToken($this->getUserToken($user));
            $this->container->get('session')->set('_security_main', serialize($this->getUserToken($user)));

            $message = (new \Swift_Message('Hello Email'))
                ->setFrom('dzimen1103@gmail.com')
                ->setTo('biuro@coderdesign.pl')
                ->setBody('Test Email');

            $mailer->send($message);

            return $this->redirectToRoute('panel');
        }

        return $this->render('auth/register.html.twig', ['form' => $form->createView()]);
    }