Lately, We have been seeing similar issues reported in SDHs regarding
Error while processing http request: failed to execute rf.collectResponse: failed to execute http client.Do: server responded with status code 401: ..... - Unauthorized: Access is denied due to invalid credentials.

Although customer is trying to follow our docs ¹ , they are facing issues regarding the correct setup.

It might be a good way to correct few things:

• More guidance (a tutorial-like approach would help)
• More external links to what we need (e.g. https://learn.microsoft.com/en-us/previous-versions/office/developer/o365-enterprise-developers/jj984325(v=office.15)#get-started-with-reporting-web-service)
• A way to validate the OAuth2 credentials and permissions are valid from command line interface (a sort of self check)