Javascript 分离路由处理程序后，我的 Express 应用程序将无法工作

我有一个工作正常的小型Express应用程序，我用它来创建注册操作，但我觉得它变得越来越混乱，所以我分离了POST请求路由处理程序，并将其放入另一个文件中，我感觉我正确地导入了所有内容，但我一直收到错误:

Cannot POST /register

以下是我的server.js文件:

  //Creating the express app and hosting it locally
const express=require('express');
const app=express();
const bcrypt=require('bcrypt');
const mysql=require('mysql2');
const flash=require('express-flash');
const session=require('express-session');
const util = require('util'); // Import the util module
const regroute=require('./Register');
  
  // Load environment variables from .env file
  require('dotenv').config();
  const port= process.env.PORT ;
  const host= process.env.DB_HOST;
  const user= process.env.DB_USER;
  const db_name=process.env.DB_NAME;
  const pass=process.env.DB_PASSWORD;
  const sec=process.env.SECRET_SESSION;
  
  
  app.listen(port);
  
  
  ////Creating a database connection object
  const connection = mysql.createConnection({
      host: host,
      user: user,
      password: pass,
      database: db_name
  });
  connection.connect();
  
  // Setting up the view engine (ejs)
app.set('view engine', 'ejs');
  //setting up middlewares
app.use(session({
    secret: sec, // Replace with a strong secret key
    resave: false,
    saveUninitialized: false
}));
app.use(express.urlencoded({extended: false}));
app.use(flash());
app.use('/register',regroute);


  ////Routing
  app.get('/',(req,res)=>{
      res.render('index.ejs');
  });
  
  app.get('/login',(req,res)=>{
      res.render('login.ejs');
  });
  
  app.get('/register',(req,res)=>{
      res.render('register.ejs');
  });
  
    

下面是我的Register.js:

const express=require('express');
const router=express.Router();


router.post('/register',async (req,res)=>{
  const {name,email,password,cpassword}=req.body;
  if(password!=cpassword){
  req.flash('error', 'Passwords do not match');
  return res.redirect('/register');
}

////Setting a query to check if an email already exist

try{
  const queryAsync = util.promisify(connection.query).bind(connection);
  const results = await queryAsync('SELECT * FROM users WHERE email=?', [email]);
    if(results.length> 0 ){
      console.log('email found');
        req.flash('error', 'Email already exists');
        return res.redirect('/register');
    }

const hashedpassword=await bcrypt.hash(password,10);
connection.query('insert into users (user_name,email,password) values (?,?,?)',[name,email,hashedpassword])
}catch(e){
  console.log('here is the error',e);
  req.flash('error','error occured please try again');
  return res.redirect('/register');
}

res.redirect('/login');
});

module.exports=router;