llInstantMessage(CORRADE,
    wasKeyValueEncode(
        [
            // Get the display name of an avatar.
            "command", "getavatardisplayname",
            "group", wasURLEscape(GROUP),
            "password", wasURLEscape(PASSWORD),
            // or agent by UUID
            "firstname", "Sarge",
            "lastname", "Sister",
            "callback", wasURLEscape(URL)
        ]
    )
);