Can Free-For-Teacher accounts use api

Community Member

If these question has already been asked, please point me to the correct tree to bark up.  First time posting here so, yoroshiku.

I am learning how to work with Canvas' API for work.  The goal is to send off scores from a VR medical simulation into a Canvas course assignment.  

I got the "Free-for-teacher" version in order to test things out.

I got an API key and set up a fake course, however when I make the Web Request, it always returns the html for the login page.

Is there another way of authorization, or is the a big bucket for all users and there is no admin access?  Would I need to obtain a canvas account from my school?  I'd like a way to test out how to use the API and GET and PUT stuff as well as try out GraphQL.