NodeJs

Step 1 create an userscontroller.js in controllers folder

exports.userlist= (request,response)=>{
    response.send("This is userlist Api")
}

Step - 2 create an usersroute.js in routes folder

const express = require('express')
const router = express.Router();
const userscontroller = require('../controllers/userscontroller')
router.get('/userlist',userscontroller.userlist)
module.exports = router;

Step - 3 Add some code in index.js

app.use('/users',require('./routes/usersroute'))

full content of the file will be 

const express = require('express')
const app = express();
const port = 8080;
app.get('/',(request,response)=>{
    response.send(`Server has been strated by Rajesh at ${port}`)
})
app.use('/users',require('./routes/usersroute'))
app.listen(port,()=>{
    console.log(`Server is started at ${port}`)
})