insert into mongodb node js

//CRUD

const mongodb = require('mongodb');
const MongoClient = mongodb.MongoClient;

const connectionURl = 'mongodb://127.0.0.1:27017';
const databaseName = 'task-manager';

MongoClient.connect(
	connectionURl,
	{ useNewUrlParser: true },
	(error, client) => {
		if (error) {
			return console.log('unable to connect to database');
		}

		const db = client.db(databaseName);

		db.collection('users').insertOne({
			name: 'user',
			age: 24,
		});
	}
);