Authentication log full of - CRON[xxx]: pam_unix(cron:session): session opened

Hi,

I have OMV 2.2.5 on RPi v3. All is working fine but I am getting the following log entries in my authentication log. They are generated every 10 mins. I haven't noticed anything wrong with how the system is working.

Does this have something to do with OpenVPN plugin? I see there is 'PAM' authentication in openVPN and thought this might use pam_unix.

any help appreciated.

Jul 10 07:39:01 pi-omv CRON[2690]: pam_unix(cron:session): session opened for user root by (uid=0)
Jul 10 07:39:01 pi-omv CRON[2690]: pam_unix(cron:session): session closed for user root