关于php:drupal8使用控制器渲染模板树枝的错误

protected $twig ;

public function __construct(\Twig_Environment $twig)
{

    $this->twig = $twig ;
}

public function index()
{

    $twigFilePath = drupal_get_path('module', 'client') . '/templates/index.html.twig';

    $template = $this->twig->loadTemplate($twigFilePath);

    $user = ['user' => 'name'] ; // as example

    $markup = [

        '#markup' => $template->render( ['users' => $users ,'kit_form' => $output] ),

        '#attached' => ['library' => ['client/index.custom']] ,

    ];

    return $markup;

}

// this is called first then call constructor
public static function create(ContainerInterface $container)
{

    return new static(

        $container->get('twig') ,

    );
}
}