Need to see which users are active on your Domino deployment, what license type they have, and what kinds of workloads they've recently run? There's a report for that. You can download the report for your preferred timeframe or use an undocumented API (subject to change in future versions of Domino) to pull down that information.
Download the report from the Admin UI.
In your Domino deployment, when logged in as an Admin: navigate to Admin -> Advanced -> User Activity Report. Select your date range and download as a CSV.
Use the undocumented API
There is an undocumented API that can be found at the handle
/admin/generateUserActivityReport (subject to change). You can use this to view or download the report from a Domino workspace or job. This can also be run as a scheduled job that emails you the results on a regular basis.