Could not able to post data on node server - node.js

Question

I am trying to hit http://localhost:5000/api/auth/ with post request using postman but it says "cannot post api/auth".
I am using mongo db and node js server.js
server.js file:
const express = require('express');
var connectDB = require('./config/db');
const app = express();
//connect database
connectDB();
// initializing middleware
app.use(express.json({extended: false}));
app.get('/', (req,res) =>
res.json({msg:'Hellow we are here'}));
//Define Routes
app.use('api/auth', require('./routes/auth'));
app.use('/api/users', require('./routes/users'));
app.use('/api/contacts', require('./routes/contacts'));
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => console.log ("server running at port 5000"));
Here is the auth file:
const express = require('express');
const router = express.Router();
const bcrypt = require('bcryptjs');
const jwt = require('jsonwebtoken');
const {check, validationResult} = require('express-validator');
const config = require('config');
const User = require('../models/User');
//#route GET api/auth
//#desc Get logged in user
//#access private
router.get('/', (req, res)=> {
res.send('Get logged in suser');
});
//#route POST api/auth
//#desc Auth user and get token
//#access public
router.post (
'/',
[
check('email', 'Please enter a valid email').isEmail(),
check('password', 'password required').exists(),
],
async (req, res)=> {
const errors = validationResult(req);
if(!errors.isEmpty()){
return res.status(400).json({errors: errors.array()});
}
const {email , password} = req.body;
try{
let user= await User.findOne({email});
console.log(user);
if(!user)
{
return res.status(400).json({msg:"Invalid credentials"});
}
const isMatch = await bcrypt.compare(password, user.password);
if(!isMatch)
{
return res.status(400).json({msg:"Invalid credentials"});
}
const payload = {
user: { id: user.id }
};
jwt.sign(payload,
config.get('jwtSecret'),
{expiresIn: 36000},
(err, token) => {
if (err)
{ throw err;}
res.send({token});
});
}
catch (err) {
console.error(err.message);
res.status(500).send('server error');
}
});
module.exports = router;

Answer 1

There's a missing leading slash where you define the routes. It is
//Define Routes
app.use('api/auth', require('./routes/auth'));
but it should be
//Define Routes
app.use('/api/auth', require('./routes/auth'));