Using API with a programming language

The API works well with Postman, but I am not succeeding in using it with powershell. The code snippets from Postman fail. This is easy with other API’s we use, but something is not quite right here. Can anyone help?

What is the error you’re getting?

I did not see your answer before, but thanks for asking. We figured it out.
How do we see the roadmap for the API? It is a good start but there is more we’d like it to provide