Creating Usage Metrics report in PowerBI desktop for multiple workspaces

Hi All , 

We are trying to create a custom usage metrics report using PowerBI desktop  that can capture statistics for multiple ( 10+) workspaces in a single report. 

We would like to avoid reinventing the wheel if something like already exists, Can you please point us to any existing documentation for such report or Can you please guide us on how to fetch usage metrics data for multiple workspaces in PowerBI desktop effectively ?