NeophyteLM Controller? You mean the Collector? Using PowerShell on the Collector doesn't actually get you anything you wouldn't have running powershell anywhere else (like your laptop).
What exactly are you trying to accomplish through the API? Knowing what your goal is can help us guide you to the right way of getting there.
Postman is not required. It's just easier to compartmentalize the API call from the scripting. It lets you get the API call details sorted out without having to battle scripting challenges at the same time.
Btw, here's a href="https://communities.logicmonitor.com/topic/1964-accessing-the-logicmonitor-rest-api-with-postman-and-lmv1-api-token-authentication/" rel="">information you'll need to get postman setup.
