https://developers.weixin.qq.com/doc/offiaccount/User_Management/Get_users_basic_information_UnionID.htmlhttps://developers.weixin.qq.com/doc/offiaccount/User_Management/Get_users_basic_information_UnionID.htmlhttps://developers.weixin.qq.com/doc/offiaccount/User_Management/Get_users_basic_information_UnionID.html

获取用户列表接口拿到全部openid，通过获取用户基本信息(UnionID机制)接口更新unionid时，有几个openid返回的值都是空的，请问如何解决？