I am using the free trial for proof of concept. I try to get an oath2 token with the sample curl command specified. I get an OK 200, but empty response:
< HTTP/2 200
< date: Thu, 08 Sep 2022 08:46:20 GMT
< content-length: 0
< server: Microsoft-IIS/10.0
< x-powered-by: ASP.NET
If I send a non matching secret, I get the error I expect.