请问方法调用方法，return套娃，咋不显示值呢？

  //检验用户
    public function checkUsers($access_token = ''){
        if(!$access_token){
            return json(['status' => 201,'msg' => '请登录后操作']);
        }
        $userData = object_array(Db::table('users')->where('access_token',$access_token)->first());
        if(!$userData){
            return json(['status' => 201,'msg' => '系统错误~，打开“系统设置”->“清除缓存”']);
        }
        $this->userData = $userData;
    }

    //保存用户资料
    public function editUserInfo(Request $request){
        $this->checkUsers($request->post('access_token'));
        return json($this->userData);
    }