Logging wifi client connections

I'm interested in logging wifi client connections on an Opal and a Beryl, I have absolutely searched here but I feel I'm missing something because I can't find any reference to anybody asking about this in the past.
Nothing special just a who's connected and when they connect and disconnect, maybe with MAC, or simply with device name. Mac is probably better.

I don't want to add a captive portal, because that's not what I'm looking for, just who's connected and when

Any thoughts?

Actually no exactly this log so far, but you can search and find it in the system log.
By filtering the mac address, or associate request. Not so convenient, I agree.