Problem connecting to API

I'm very new to using API's (literally my first try) so I may be missing something obvious here.

I'm trying to connect to the Amplify API (http://docs.amplifyv01.apiary.io/) but can't quite seem to manage it, although colleague of mine did it using his console no problem. So the API and the credentials etc are fine, I must be doing the wrong thing in Power BI. I can use the login part of the API to get a token through Power BI (shows up as a one row table) but whenever I try calling a data entity it tells me that the user is not authorized (when I use web page as data source and basic authentication) or that the token is not authorized (when I use web API authentication), but my colleague verified that it is not the case. So I'm doing something wrong in Power BI, any help and insight is greatly appreciated.