Получение данных из другого js файла

const mysql = require('mysql');
var db = mysql.createConnection({
    host:'localhost',
    user:'root',
    password:'',
    database:'list_',
});
module.exports = db;

var pages = require('./module/settings');

var Request = new XMLHttpRequest();
Request.open('GET', 'имя_файл');

function Recive(){
  var u=document.getElementById('s1').value; //получили ФИО
  console.log(u);
  let user = JSON.stringify({userName:u});
  const request = new XMLHttpRequest();
  const url = "/clients"
  request.open('POST',url, true);
  request.setRequestHeader("Content-Type", "application/json");
  request.addEventListener("load", function(){
    if(request.readyState === 4 && request.status===200)
    {
      let resuser = JSON.parse(request.response);
      console.log(resuser);
    }
  });
  request.send(user);
};

app.get('/clients',checkAuthenticated,function(req,res){
  conn.query('SELECT * FROM CLIENTS',
  function(error,result){
    if(error) throw err;
    var r =result.fetchSync('all',true);
    var clients = [];
    for(let i=0; i<r.length; i++)
    {
      clients.push(r[i]);
    }
    let NewClients=clients.map(client=>{
      return{
        ...client,
        DATE_OF_BIRTH: new Date(client.DATE_OF_BIRTH).toLocaleDateString(),
        DATE_OF_ISSUE: new Date(client.DATE_OF_ISSUE).toLocaleDateString()
      }
    })
    req.isAuthenticated()?res.render('clients.pug',{NewClients, name: req.user.name}):res.redirect('/login')
 
  })
})
app.post('/clients', jsonParser, function(req,res){
  console.log(req.body);
  var clients = [];
  if(!req.body) return res.sendStatus(400);
  conn.query('SELECT * FROM CLIENTS',
  function(error,result){
    if(error) throw err;
    var r =result.fetchSync('all',true);
    for(let i=0; i<r.length; i++)
    {
      clients.push(r[i]);
    }
}
  res.json(clients);
})