First get a API Key, skip if you already have a API Key.
Log into your PagerDuty instance, go to Configuration > API Access
Click on Create New API Key
Add a Description, then select Create Key
You should now have a PagerDuty API key
PagerDuty has an excellent API reference
Under the section for Users > Create a User they give us hints on how we can code this in PowerShell. We will be using the Invoke-RestMethod, and we will start with the header.
In the API reference page, we can try out the API calls, when click try PagerDuty shows all actions. Also keep note of the method POST.
We need to transform it for the Invoke-RestMethod, this is how it should look like
Now for the body, the example that PagerDuty API reference page shows.
Here is how it should look like
Now to put everything together
Here is a function I build to create accounts