Splunk search for Splunk User Creations, Modifications, Deletions
index=_audit action=edit_user operation=create
|rename object as user
|eval timestamp=strptime(timestamp, "%m-%d-%Y %H:%M:%S.%3N")
|convert timeformat="%d/%b/%Y" ctime(timestamp)
|table user timestamp
Search to track creations, modifications, and deletions of Splunk user accounts.