I am a developer but I admit I am confused by going through the Marketing Cloud API documentation.
Inside our Marketing Cloud's installed packages, I created a new package and added an API Integration component to it. I then chose the integration type of Server-to-Server. I got the following endpoints and information about my integration:
The first thing I would like to test is to update a field on the All Subscribers list for a specific subscriber.
Could somebody guide me through how do I prepare the request and how to do a very basic test?