Auditing with Power BI has been available for a few months within the US and more recently within all regions except Europe and Australia as a preview. This provides auditing on certain events to understand what your organization is doing with the service.
The new activity that has been added is when a free user signs up for the 60 day Power BI Pro Trial within the Power BI service. This activity is called OptInForProTrial.
In this video, I show you how you can use PowerShell to assign Power BI Pro licenses based on those audit log entries.
Full Blog with PowerShell script
Additional Options for automating Power BI License Assignment – https://youtu.be/x-dvc-YZgco