um instead of an alias you can also use menu nicklist to add or remove users like this
menu nicklist {
.Add/Del user\'s
..$iif($1 isin %Quote.list,$style(2)) Add $+($chr(40),$1,$chr(41)): { set %Quote.list $addtok(%Quote.list,$1,32) | echo -a User $+($chr(40),$1,$chr(41)) has been added. }
..$iif($1 !isin %Quote.list,$style(2)) Del $+($chr(40),$1,$chr(41)): { set %Quote.list $remtok(%Quote.list,$1,1,32) | echo -a User $+($chr(40),$1,$chr(41)) has been removed. }
..$iif(!%Quote.list,$style(2)) $+($chr(91),$numtok(%Quote.list,32),$chr(93)) $+(User\'s,$chr(58)) List them: { echo -a $gettok(%Quote.list,1-,32) }
}