Get client name with unlang

Hi, https://wiki.freeradius.org/config/run_time_variables here it says I can use the "%C" variable to get clientname (clients.conf) but it also says "The following variables are obsolete and have been removed from version 3 of the server. They are duplicates of the previous general cases, and were only provided for backwards compatibility." So how can I get the client name? Blindly tried xlat %{client:name} but it did not work. Regards Rahman Duran Bilgi İşlem Daire Başkanlığı Erzurum Teknik Üniversitesi 444 5 388 - 2730