HttpPost requests seem to be appending the data to the url as well as payload

[gregsochanik]

Noticed this trying to upgrade Sonos and the 7d.Wrapper.Authentication library.

Am getting
Query string parameters are not permitted when performing HTTP Post. Please use Post body or header.

and when I check the original url of the response for a HttpPost endpoint, it has the postbody params appended to the querystring, e.g:

https://api.7digital.com/1.2/oauth/requesttoken/authorise?token=B3WJYYV&username=device-integration%407digital.com&password=******

I'll look into it now as I need to ensure I have the latest version to fix that RouteParamSubstitutor bug that crops up now and again, which was fixed with 8.0.0. If I can fix I'll release as 8.0.1