Cell 3

$.async();
getIdentityServer()
    .then(r => $.sendResult(r))
    .catch(e => $.sendError(e));

What the code could have been:

/**
 * Asynchronously retrieve the identity server information.
 * @returns {Promise<string>} A promise resolving to the identity server response.
 */
async function identifyServer() {
  try {
    const response = await getIdentityServer();
    return sendResult(response);
  } catch (error) {
    sendError(error);
  }
}

/**
 * Sends the result of the operation to the client.
 * @param {string} result - The result to be sent.
 */
function sendResult(result) {
  $.sendResult(result);
}

/**
 * Sends the error of the operation to the client.
 * @param {Error} error - The error to be sent.
 */
function sendError(error) {
  $.sendError(error);
}

/**
 * Asynchronous entry point for the operation.
 */
async function main() {
  await identifyServer();
}

main();
```

However, since your code snippet uses the async function directly, you can also make use of async/await to remove the then and catch blocks.

```javascript
/**
 * Asynchronously retrieve the identity server information.
 * @returns {Promise<string>} A promise resolving to the identity server response.
 */
async function identifyServer() {
  try {
    const response = await getIdentityServer();
    $.sendResult(response);
  } catch (error) {
    $.sendError(error);
  }
}

/**
 * Asynchronous entry point for the operation.
 */
async function main() {
  await identifyServer();
}

main();