We found the solution. You can get that information via Metric API. For example, when you want the number of "minutes_online" in a specific date range and on a specific role (e.g. Administrator) you can make this restadmin call: /restapi/vc/roles/name/Administrator/metrics/name/minutes_online?date_start=2017-07-01&date_end=2017-08-01 When you type only /restapi/vc/roles/name/Administrator/metrics/name you retrieve a list of all metrics on a specific role.
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