REST + user without e-mail address = no requestor

Is it possible to create a ticket through REST with a user which has no e-mail address ?
This doesn’t work :
#!/usr/bin/env perl
use strict;
use RT::Client::REST;
my $rt = RT::Client::REST->new( server => ‘http://myrtserver’ );$rt->login(username => ‘user’, password => ‘password’ );
$rt->create( type => ‘ticket’, set => { requestor => ‘rt_user’, # user with no e-mail address queue => ‘test’, subject => ‘test’ }, text => ‘1 2 1 2 this is a test’);

the ticket is created without any requestor…

Try id instead of name, but I wouldn’t be surprised if it doesn’t work.

Ruslan from phone.