makeWebRequest URL with Params

As I mentioned here as a question, there is still one issue with making web requests.

Some webservices contain authentication parameter within the URL. It is not possible to combine them with other parameter.

For example Microsoft Flow or Azure-Functions (Containing a fake sig):
https://prod-45.westeurope.logic.azu...l/paths/invoke?api-version=2016-06-01[/url]&sig=AbCdEfGhIjKlMnOpQrStUvW1234567890

Using this URL, I cannot submit data with "params" in
Comm.makeWebRequest(url, params, options, responseCallback);
It gives me a 401 with parameter and a 400 with null as params. I guess, leaving params null, the authentications works, but the data is missing.

Removing api & sig from the URL and enhance it to the data, it does not work. Neither in header, nor in params.
That's why expect an issue rather then a wrong coding approach. Using Azure Functions without authentication token, the code works fine!