403 Forbidden - MediaAPI

Hi, when I try and use the POST make a call function, I get this response, but I can’t seem to figure out what I have to change to fix it? The only other response I can get is 400, saying unknown user.

That general error implies the method+route that you’re calling doesn’t exist.

I got stuck with this for a few hours and ended up solving it, thought I would put an update in here for the next person.

Error is very misleading. In my case, I was sending the request to;
https://media.api.mitel.io/endpoints/xxxx/calls

From some of the documentation this seemed correct, however it should have been;
https://media.api.mitel.io/2017-09-01/endpoints/xxxx/calls