Issues with tutorial

[ptiger10]

I found this code after reading Understanding OAuth2 and Deploying a Basic Authorization Service to Cloud Functions tutorial. I wanted to bring two items to your attention with the tutorial:

1. "Download the code here" redirects to https://cloud.google.com/code and returns a 404 error
2. The tutorial currently contains this content:

You write that implicit and client credentials are reserved for special clients, and then also reference implicit and client credentials as the flows that "other clients" can use. Is this a typo? Should it instead be something like: Highly trusted apps -> Resource Owner Password Credentials Less trusted apps -> Authorization Code

Thank you for the tutorial.