public function goods()
 {
     # status = 0 means user hasn't gotten this goods
     $goodsUsers = GoodsUser::status(0)->orderBy('created_at')->paginate(5);
     $goodsUsers->setPath(url('/back/reception/goods'));
     return view('back.reception.goods', compact('goodsUsers'));
 }
 /**
  * 返回显示所有已兑换商品视图
  */
 public function received()
 {
     # status = 1 means use has gotten this goods
     $goodsUsers = GoodsUser::status(1)->orderBy('created_at')->paginate(5);
     $goodsUsers->setPath(url('/admin/goods/sell'));
     return view('back.goods.received', compact('goodsUsers'));
 }