Thanks a lot for the reply.
It doesn't necessarily have to be every 1 hour. I kinda just want it to require a password every so often. So its not like, the users just have to enter the password once, and as long as the computer is on the password isn't required anymore.
I remember before switching to freenas. I just used a hard drive that is attached to my router via usb. At that time, I remember after some time (I don't remember the exact time), when the user tries to access the files again, it would require the user to enter username and password again..
I just want the same experience as before thats all.