Removing a User from an array

app.js

// Define WebSocket using ws library
const WebSocket = require('ws');

// Initialise wss as a new Websocket Server running in port 8989
const wss = new WebSocket.Server({ port: 8989 });

// Array of users currently logged in. Serves as the Database.
var users = [];

// This is the code that will run on the server when a new client is connected to
// the web socket server.
wss.on('connection', (ws) => {
  
  // Random number
  let userId = Math.floor(Math.random() * 10**10);
  
  // .... 
  // rest of the code here
  // ....
  
    // When we add the new user to the array of users, use userId
    users.push({
      name: data.name,
      id:   userId
    });
  
  // ...
  
  // When the connection is closed, remove the user with userId
	ws.on('close', () => {

		// Remove User from 'database'
		users = users.filter( (u) => {
			return u.id !== userId
		});

		// Send updated user list to all the connected users
		broadcast({
			type: 'USERS_LIST',
			users
		}, ws);
	})
  
});