Is the README and sample code for initialising auth token still correct?

[tunniclm]

We have been integrating Google Business Messages into our application and have been using the Quick Start document and Samples as a guide on how to authenticate with the APIs.

We noticed that the guide uses the following code for initialising the auth token:

async function initCredentials() {
  authClient = await auth.getClient();

  // Initialize auth token
  authClient.refreshAccessToken();
  await authClient.getAccessToken();
}

Referring to the API documentation for the google-auth-library, we noticed that refreshAccessToken() is an async function and wondered whether we should be awaiting the call in our initialisation code.

After some research we also wondered whether the call to refreshAccessToken() is still necessary since there are several threads suggesting that it may no longer be needed (along with it being deprecated, then subsequently undeprecated again).

Here are some links to the relevant threads/documents:

• API doc for refreshAccessToken(): https://cloud.google.com/nodejs/docs/reference/google-auth-library/latest/google-auth-library/oauth2client#google_auth_library_OAuth2Client_refreshAccessToken_member_1_
• Discussing whether refreshAccessToken() is still needed and what should replace it: Document correct OAuth2 handling of invalid_credentials errors vs deprecated methods googleapis/google-auth-library-nodejs#575
• Removing deprecation of refreshAccessToken(): feat: do not deprecate refreshAccessToken googleapis/google-auth-library-nodejs#804
• Echo bot sample using refreshAccessToken() without await: https://github.com/google-business-communications/bm-nodejs-echo-bot/blob/master/full_sample/routes/index.js#L299

Therefore, my question is whether or not the Quick Start guide and sample are still correct or is there a potential race condition or other issue with the token initialisation code?

If we should be using await or replacing refreshAccessToken() with something else, then what does that code look like and can the Quick Start guide and sample be updated?

Thanks!