From the NannyMUD documentation

LAST CHANGE

2000-12-19

FUNCTION

NAME
        _query_ident - Get the user identifier.


SYNTAX
	string _query_ident(void|object)

DESCRIPTION
	Returns the user identifier as returned by the Identification Server
	Protocol (se RFC931 or later revisions for more information about the
	protocol) for the current or specified player object.

	If an argument is specified, then this function can only be called
	by wizards of exalted level or higher; otherwise it will return 0.


SEE ALSO
        wizlevels in wizinfo/wizlevels