I'm trying to create a lti 1.3 integration in Brightspace (POC), and I was able to get to the point where the tool endpoint is launch. At this endpoint I'm trying to get access token in order to get the membership data, so I send the request (for the access token) with the relevant scope and all the credentials with no success. I also added to the url address the relevant parameters as the documentation shows.
I think that at this point I should get the access token with no problems, because when I was trying to integrate with moodle I successfully received the access token back. I know there is a standard in all LMSs but Is there any specific adjustment to integrate with Brightspace.