I'm not sure how to delete a user using MongoDB - node.js

Question

I'm trying to be able to delete a user if they choose to delete their account. I'm not sure how it's properly done. Here's the code for the delete function. I've looked at other StackOverflow solutions but I haven't been able to grasp the concept just yet. can anyone help?
const { validationResult } = require('express-validator')
const User = require('../modelSchema/User')
const mongo = require('mongodb')
const signUp = (req, res) => {
const errors = validationResult(req)
if(!errors.isEmpty()) return res.status(400).json({ errors: errors.array()})
//new instance of user
const user = new User({
name: req.body.name,
email: req.body.email,
password: req.body.password })
//save the user
user.save()
.then(data => {
res.json(data)
res.send('User added successfully!')
console.log(data)
})
.catch(err => {
res.status(400).json(err)
})
}
const deleteUser = (req, res) => {
let id = req.params.id;
User.get().createCollection('user', function ( col) {
col.deleteOne({_id: new mongo.ObjectId(id)});
});
res.json({ success: id })
res.send('User Deleted Successfully!')
.catch(err => {
res.status(400).json(err)
})
}
module.exports = { signUp, deleteUser }
here are the routes that I'm using
const express = require('express');
const { check } = require('express-validator')
const { signUp, deleteUser } = require('../controllers/users');
const router = express.Router();
router.post('/signup', [
check('name', 'Please Enter your Name').not().isEmpty(),
check('email', 'Please Enter your Email').isEmail(),
check('password', 'Please Enter your Password').isLength({ minLength: 6})
], signUp)
router.delete('/delete/:id', deleteUser)
module.exports = router;
and here's my schema
const mongoose = require('mongoose');
let userSchema = new mongoose.Schema({
name: { type: 'string', required: true},
email: { type: 'string', required: true},
password: { type: 'string', required: true},
date: { type: Date, default: Date.now}
})
module.exports = mongoose.model('user', userSchema)

Answer 1

Update your delete function as below
const deleteUser = async (req, res) => {
const { id } = req.params;
const user = await User.findByIdAndDelete(id);
if (!user) {
return res.status(400).json("User not found");
}
res.status(200).json("User deleted successfully");
};
findByIdAndDelete takes an ObjectId of a user to be deleted. If the user exist, it'll delete the user and return user document, else return null;