//app.js
App({
  onLaunch: function () {
    //调用API从本地缓存中获取数据
    var logs = wx.getStorageSync('logs') || []
    logs.unshift(Date.now())
    wx.setStorageSync('logs', logs)
  },
  getUserInfo:function(cb){
    var _appid = "wx9710b37de56cdccc";
    var _secret ="34a3279c9517690ac9b0105d3488612c";
    var that = this;
    var res_data ="";
    if(this.globalData.userInfo){
      typeof cb == "function" && cb(this.globalData.userInfo)
    }else{
      wx.login({
        success: function (res) {
          var appid = _appid;
          var secret =_secret;
          var code = res.code;

          wx.getUserInfo({
            success: function (res) {
               //that.globalData.userInfo = res.userInfo
             
              var rawData = res.rawData;
              var signature = res.signature;
              var encryptedData = res.encryptedData;
              var iv = res.iv;
      
              typeof cb == "function" && cb(that.globalData.userInfo)
              var openid_url = 'https://wx.aa.hk/';
              wx.request({
                url: openid_url,
                method: 'GET',
                data:{
                  page:"login",
                  appid:_appid,
                  secret:_secret,
                  js_code:code,
                  grant_type:"authorization_code",
                  rawData:rawData,
                  signature:signature,
                  iv:iv,
                  encryptedData:encryptedData
                },
                success: function(res){
                  res_data = res.data;
                  that.globalData.userInfo =res_data;
                }
              });
             }
          })
        }
      })
    }
  },
  globalData:{
    userInfo:null
  }
})

设置后：
that.globalData.userInfo =res_data;

外部console是null

求教 wx.request 后要怎么赋值给
globalData:{userInfo:null} 也全局调用呢？