About Unifi UAP-AC-PRO, unified setup

So we setup the Access Point to 5 different location and 4 of that location need a guest network… but on the 5th location our boss only wants the wireless connection for trusted devices and not advertise the guest wifi SSID… Is there a way to disable a guest network for only 1 device? We are currently using a pfSense as the firewall and only the Access Point UAP-AC-PRO… no USG and POE Switch too…

create a new wireless profile containing just the SSID you want, and apply that profile to the single AP.