Hello @Senor_Dai , Qlik provides two administrative apps called Monitor and License app inside a Stream called Monitoring apps.
You can find them selectingMonitoring appson theQMC start page, or from theStartdrop-down menu, to open the hub for the stream Monitoring appswith the apps License Monitor and Operations Monitor.
The default path to theQlik Senselog folder is%ProgramData%\Qlik\Sense\Log\<Service>.
For logging user details you can use the License app.