Man pages matching name brlapi_authclientpacket_t in section 3:

brlapi_authClientPacket_t.3.en	debian 10 / libbrlapi-dev
brlapi_authClientPacket_t.3.en	debian 11 / libbrlapi-dev
brlapi_authClientPacket_t.3.en	debian 12 / libbrlapi-dev