public function userPanelAction()
    {
        if (!$this->getDispatcher()->hasListeners(ThemeEvents::THEME_SIDEBAR_USER)) {
            return new Response();
        }
        $userEvent = $this->getDispatcher()->dispatch(ThemeEvents::THEME_SIDEBAR_USER, new ShowUserEvent());

        return $this->render(
                    'AvanzuAdminThemeBundle:Sidebar:user-panel.html.twig',
                        [
                            'user' => $userEvent->getUser(),
                        ]
        );
    }