I am a complete beginner in the subject of Knime and API control and would like to control the web API of the homepage “Netztransparenz”. I have already invested a few hours in this and when retrieving the access token via a POST request, I always end up with the server response: Status 400 invalid request.
The description of the API (in German) can be found here: “WebAPI”.
The corresponding swagger can be found here: “Swagger UI”.
Since I don’t understand very much about this field, I need precise instructions on how to proceed.