Get MAC address automatically

hi
i’m using hotspot for service my users.
in winbox when we try to create an user in ip–>hotspot–>user there is an option by name: MAC Address.
if we want users could just connect with only their own mac-addresses we can fill this section by user’s mac address
i nead a script to make it easy, a code that can save user’s MAC Address automatically after first connection via hotspot.

is it possible?

You can’t.
You should user Usermanager at least and then use:
Bind on first use.

tanks