public function renderExternalAuthenticatonButtonAction()
    {
        $event = $this->dispatcher->dispatch('render_external_authentication_button', 'RenderAuthenticationButton');

        $eventContent = $event->getContent();
        if (!empty($eventContent)) {
            $eventContent = '<div class="external_authentication"><hr>' . $eventContent . '</div>';
        }

        return new Response($eventContent);
    }