我在MEAN-stack应用程序中使用Syncfusion Scheduler。这是处理获取/插入/编辑约会的代码：

MongoClient.connect(url,function (err,db) {
if (err) throw err;
var dbo = db.db("meanstacknew");
app.use(function (req,res,next) {
    res.header("access-control-allow-origin","*");
    res.header("access-Control-Allow-Headers","Origin,X-Requested-With,Content-Type,accept");
    next();
});
app.post("/GetData",(req,res) => {
    var user = req.user;

    const token = req.get("authorization");
    dbo.collection('ScheduleData').find({}).toArray((err,cus) => {
        res.send(cus);
       console.log(token);
    });
});
app.post("/BatchData",res) => {
    console.log(req.body);
    var eventData = [];
    if (req.body.action == "insert" || (req.body.action == "batch" && req.body.added.length > 0)) {
        (req.body.action == "insert") ? eventData.push(req.body.value) : eventData = req.body.added;
        for (var i = 0; i < eventData.length; i++) {
            var sdate = new Date(eventData[i].StartTime);
            var edate = new Date(eventData[i].EndTime);
            eventData[i].StartTime = (new Date(+sdate - (sdate.getTimezoneOffset() * 60000)));
            eventData[i].EndTime = (new Date(+edate - (edate.getTimezoneOffset() * 60000)));
            eventData[i].CreatedBy =  //here I want to send the email to the database
            dbo.collection('ScheduleData').insertOne(eventData[i]);
        }
    }
    if (req.body.action == "update" || (req.body.action == "batch" && req.body.changed.length > 0)) {
        (req.body.action == "update") ? eventData.push(req.body.value) : eventData = req.body.changed;
        for (var i = 0; i < eventData.length; i++) {
            delete eventData[i]._id;
            var sdate = new Date(eventData[i].StartTime);
            var edate = new Date(eventData[i].EndTime);
            eventData[i].StartTime = (new Date(+sdate - (sdate.getTimezoneOffset() * 60000)));
            eventData[i].EndTime = (new Date(+edate - (edate.getTimezoneOffset() * 60000)));
            dbo.collection('ScheduleData').updateone({ "Id": eventData[i].Id },{ $set: eventData[i] });
        }
    }
    if (req.body.action == "remove" || (req.body.action == "batch" && req.body.deleted.length > 0)) {
        (req.body.action == "remove") ? eventData.push({ Id: req.body.key }) : eventData = req.body.deleted;
        for (var i = 0; i < eventData.length; i++) {
            dbo.collection('ScheduleData').deleteone({ "Id": eventData[i].Id });
        }
    }
    res.send(req.body);
});

我在schedule.component.ts中呼叫这些端点：

 private dataManager: DataManager = new DataManager({
url: 'http://localhost:8000/GetData',crudUrl: 'http://localhost:8000/BatchData',adaptor: new UrlAdaptor,crossDomain: true
  });

此刻我正在使用JWT令牌进行用户授权，例如，这是我的/ profile端点：

   router.get('/profile',authRequired,res) => {
       User.findOne({_id: req.decoded.userId}).select('username email').exec((err,user) =>{
          if(err){
              res.json({success: false,message: err});
          } else {
              if(!user){
                  res.json({success: false,message: 'User not found'});
              } else {
                  res.json({success: true,user: user})
              }
          }
       });
    });

如何访问用户电子邮件以在约会中设置“ createdBy”字段？ 如果以这种方式console.log令牌，我只会得到undefined

这是middleware.js文件中的authRequired函数：

function authRequired(req,next) {
const token = req.get("authorization");
if (!token) {
    res.json({ success: false,message: "No token provided" });
} else {
    jwt.verify(token,config.secret,(err,decoded) => {
        if (err) {
            res.json({ success: false,message: "Token is invalid" + err });
        } else {
            req.decoded = decoded;
            next();
        }
         });
}
}

module.exports = {
authRequired: authRequired
};