我是新手，这是我的第一个严肃的编码项目.我已经尝试了100万件事，但我不知道为什么会议无法通过不同的途径持续进行.当我从两条路线登录req.session.id时，当我应该使用相同的ID时会给我两个不同的ID.

I am new to sessions and this is my first serious coding project. I've tried a million things and I can't figure out why the session isn't persisting through different routes. When I log req.session.id from two routes, it gives me two different ids when it should be the same one.

const express = require('express');
const cors = require('cors');
const mongoose = require('mongoose');
const session = require('express-session');
const bcrypt = require('bcrypt');
let User = require('./models/user.model');
const MongoStore = require('connect-mongo')(session);

require('dotenv').config();

const app = express();
const port = process.env.PORT || 5000;

app.set('trustproxy', true);

app.use(cors(corsOptions));
app.use(cors());
app.use(express.json());

const uri = process.env.ATLAS_URI;
mongoose.connect(uri, { useNewUrlParser: true, useCreateIndex: true, useUnifiedTopology: true });
const connection = mongoose.connection;
connection.once('open', () => {
    console.log("MongoDB database connection established successfully")
})

app.listen(port, () => {
    console.log(`Server is running on port: ${port}`);
});

const SESS_NAME = 'session';
const SESS_SECRET = 'youshouldchangethis'
const IN_PROD = false;

app.use(session({
  name: SESS_NAME,
  resave: false,
  store: new MongoStore({ mongooseConnection: mongoose.connection }),
  saveUninitialized: true,
  secret: SESS_SECRET,
  proxy: true,
  cookie: {
      sameSite: true,
      secure: IN_PROD,
  }
}));

登录路由会创建会话(此时将会话存储在Mongodb中就可以了)，然后将重定向重定向到仪表板，在此仪表板req.session会返回未定义状态，因此我无法访问该会话.这是登录和仪表板路线.任何帮助，我们将不胜感激！

The login route creates the session (the session is stored inside Mongodb just fine at this point), then react redirects to dashboard, where req.session comes back undefined and I'm unable to access that session. Here's the login and dashboard routes. Any help is greatly appreciated!

app.post('/login', (req, res) => {
  console.log("in login post");
  User.findOne({ email: req.body.email })
    .then(user => {
      bcrypt.compare(req.body.password, user.password, function (err, result) {
        if(result == true){
          req.session.userId = user._id;
          console.log(req.session.id);
          res.send(user);
        } else {
          res.send('Authentication Failed');
        }
      })
    })
    .catch(err => res.send('Authentication Failed'));
});

// Dashboard Router
app.get('/dashboard', (req, res) => {
  if (req.session.userId){
    User.findOne({ email: req.session.user.email }) // FIX: not able to find session / user
      .then(user => {
        console.log("found user")
        // req.session.user = user;
        res.send(user);
      })
      .catch(err => {
        //req.session.reset();
        res.send(err);
      })
  } else {
    console.log(req.session.id);
  }
});