在js里通过一个function中获取当前用户的openid，然后存到page里的data中，在其他fuction里再调用data的值返回就是空，请问什么原因？

Page({
  data: {
    useropenid: '',
    my_order_list: []
  },
getopenid_local() {
    var that = this
    wx.cloud.callFunction({
      name: "getopenid",
    }).then(res => {
      that.setData({
        useropenid: res.result.openid
      })
      console.log("data.useropenid: ", that.data.useropenid)
    }).catch(res => {
      console.log("openid获取失败", res)
    })
get_order_list() {
    var that = this
    that.getopenid_local()
console.log("orderlist里的openid:", that.data.useropenid)
    wx.cloud.callFunction({
      name: "get_invite_list",
      data: {
        cloud_openid: that.data.useropenid
      },
      success(res) {
        that.setData({
          my_order_list: res.data
        })
        console.log("成功获取res的数据：", res, that.data.my_order_list)
      }, fail(res) {
        console.log("获取res的数据失败", res)
      }
    })
  },