You can enable Splunk audit logs and use them to create dashboards in Splunk. These logs record the same information as the default audit logs, but they are formatted to facilitate parsing for specific information when you create dashboards. All of the necessary information resides within the commented-out sections.
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The link above provides instructions on how to set up the PingAccess for Splunk app, which can be found here: https://splunkbase.splunk.com/app/5368