Use the Usage dashboards
The dashboards accessed from the Cloud Monitoring Console > Usage tab enable Splunk Cloud Platform administrators to monitor the users who have access to your Splunk Cloud Platform deployment. The User Activity dashboard lets you review user activity in the system over a specified time range. The User Detail dashboard lets you drill down into the activities of a specific user.
To access the Usage dashboards at any time from within CMC, you can click the Usage link in the navigation bar. Select the dashboard that you want to view from the menu.