Need Report of users using XabAB_TBBBBB_Dashboard in Splunk Report Window : 20th August - Till Date

Looking for query where we can find users using the dashboards .Since when Iam trying to find by using below query it gives wrong results .Thanks in advance :) index="_internal" sourcetype=splunkd_ui_access | rex "/app/(?[^/]+)/(?[^?/\s]+)" |stats values(user)