/**
     * @Route("/register", name="register")
     */
    public function registerAction(Request $request)
    {
        $input = $request->query;
        if (
            $input->has('username') &&
            $input->has('password') &&
            $input->has('email')
        )
        {
            $username = $input->get('username');
            $booster = new Booster();
            $booster->setUsername($username);
            $booster->setPassword($input->get('password'));
            $booster->setEmail($input->get('email'));
            $em = $this->getDoctrine()->getManager();
            $em->persist($booster);
            $em->flush();
            // ... etc.
            $session = $request->getSession();
            $session->set('username', $username);
        }
    }

    /**
     * @Route("/login", name="login")
     */
    public function loginAction(Request $request)
    {
        $input = $request->query;
        if ($input->has('username') && $input->has('password'))
        {
            $username = $request->query->get('username');
            $password = $request->query->get('password');
            $boosters = $this->getDoctrine()->getRepository('AppBundle:Booster');
            $booster = $boosters->find($username);
            if ($password === $booster->getPassword())
            {
                $session = $request->getSession();
                $session->set('username', $username);
                $route = '...';
            }
            else
            {
                $route = '...';
            }
            $this->redirectToRoute($route);
        }
    }