wx.getWeRunData({
  success (res) {
    // 拿 encryptedData 到开发者后台解密开放数据
    const encryptedData = res.encryptedData
    // 或拿 cloudID 通过云调用直接获取开放数据
    const cloudID = res.cloudID
  }
})

类似获取 getWeRunData ？ 得到cloudID 。

https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/share/private-message.html

    wx.authPrivateMessage({
      shareTicket: object.shareTicket,
      success(res) {
        console.log('authPrivateMessage success', res);
        //没有这个cloudID ???? 
      },
      fail(res) {
        console.log('authPrivateMessage fail', res)
      }
    })

authPrivateMessage 试过，得不到这个CloudID .