try {
            var tj_json = {
                "openid": openid,
                "transactionId": transactionId,
                "mchId": mchId,
                "outTradeNo": outTradeNo
            }
            console.log("提交", tj_json);
            const result = await cloud.openapi.auth.getPaidUnionId(tj_json)
            console.log(result);
            /*await db.collection('user').doc(openid).update({
                data: {
                    unionid: unionid
                }
            })*/
        } catch (err) {
            console.error(err);
        }

云函数错误信息：

云函数权限：