Login logoff reports

Hi

im using Spark and I was wondering if there is anything out there that creates reports on users online/offline activity

using spark preferences i can select notify when user comes online & notify when user goes offline… is there anything out there that will create a log/report based on these notifactions. Basically i have all my users configured to log on on startup and im wanting to create an attendance log/report on a daily basis. anyone help?