User Log Files

I'm trying to locate a log in a PMP-450 AP (v15.0.3) which will give me the date, time, and the user who makes configuration changes to the AP. I've downloaded the engineering logs, but so far it doesn't help. Does anyone know if this exists? We currently don't run a SysLog server; Syslog Level setting = "info".

Under HOme, look for Event log tabĀ 

Thanks for the reply, but that only shows me the user when the unit is rebooted. For instance, I'm looking for a log which will show what changes were made to the config and who made those changes, plus date, time.