简析laravel怎么局部排除中间件

// 用户端接口
Route::prefix('client')->group(function () {

    Route::apiResource('applys', 'ApplysController');
    //需要登录授权的接口

    //multiauth:member_api 中间件全局注册

    Route::group(['middleware' => ['multiauth:member_api', 'check.member']], function () {

    });});

 private $flag;

    public function __construct(Request $request)

    {

        $this->flag = false;
        //判断是否有令牌
        if(array_key_exists('authorization',$request->header())){

            $this->middleware( ['multiauth:member_api', 'check.member']);

        }else{

            $this->flag = true;

            $this->middleware( ['multiauth:member_api', 'check.member'],['except' => 'index']);

        }

    }