Dingo\Api\Provider\HttpServiceProvider::registerMiddleware PHP Method

    protected function registerMiddleware()
    {
        $this->app->singleton(Request::class, function ($app) {
            $middleware = new Middleware\Request($app, $app[ExceptionHandler::class], $app[Router::class], $app[RequestValidator::class], $app['events']);
            $middleware->setMiddlewares($this->config('middleware', false));
            return $middleware;
        });
        $this->app->singleton(AuthMiddleware::class, function ($app) {
            return new Middleware\Auth($app[Router::class], $app[Auth::class]);
        });
        $this->app->singleton(RateLimit::class, function ($app) {
            return new Middleware\RateLimit($app[Router::class], $app[Handler::class]);
        });
        $this->app->singleton(PrepareController::class, function ($app) {
            return new Middleware\PrepareController($app[Router::class]);
        });
    }