REST Get Request for Sharepoint

Dear all,

I would be glad if someone could help me out on how to set up GET Request to be sent to a MS Sharepoint.

Eventually, I want to identify users with access to items in a Sharepoint library which is only possible via REST API at the moment.

I tried following setup but it only returns:

3000003;reason=“Invalid audience Uri ‘00000002-0000-0000-c000-000000000000’.”;category=“invalid_client”

My workflow:

Overview:

OAuth2 Settings (will be accepted: “Authentication complete. You can close the browser.”)

Settings of the GET Request Node:

However, I am receiving a full list of items by opening the link with a browser.

Happy to receive any advice.