Authenticate your Users

Your users must be authenticated to be able to participate in the Conversation. You perform this authentication using the Conversation ID and the JWTs you generated in a previous step.

Declare the following variables at the top of your chat.js file and populate USER1_JWT, USER2_JWT and CONVERSATION_ID with your own values:

const USER1_JWT = '';
const USER2_JWT = '';

const messageTextarea = document.getElementById('messageTextarea');
const messageFeed = document.getElementById('messageFeed');
const sendButton = document.getElementById('send');
const loginForm = document.getElementById('login');
const status = document.getElementById('status');

const loadMessagesButton = document.getElementById('loadMessages');
const messagesCountSpan = document.getElementById('messagesCount');
const messageDateSpan = document.getElementById('messageDate');

let conversation;
let listedEvents;
let messagesCount = 0;
let messageDate;

function authenticate(username) {
  if (username == "USER1_NAME") {
    return USER1_JWT;
  if (username == "USER2_NAME") {
    return USER2_JWT;
  alert("User not recognized");

You'll also need to add an event listener to the login form to fetch the user's JWT and pass it in to the run function. The run function doesn't do anything yet, but at this point you have a valid user JWT to start building your application.

loginForm.addEventListener('submit', (event) => {
  const userToken = authenticate(document.getElementById('username').value);
  if (userToken) {
    document.getElementById('messages').style.display = 'block';
    document.getElementById('login').style.display = 'none';

async function run(userToken){