Jarves\Controller\Plugin\UserLogin::doLogin PHP Method

    public function doLogin(Request $request)
    {
        $success = $this->userOperator->login($request->request->get('email'), $request->request->get('password'));
        $session = $request->getSession();
        $session->start();
        if (!$success && $session instanceof Session) {
            $session->getFlashBag()->add('error', 'LOGIN_FAILED');
        }
        return $this->loginForm();
    }