my @suggestions;
+$users->Limit( FIELD => $return, OPERATOR => '!=', VALUE => '' );
+$users->Limit( FIELD => $return, OPERATOR => 'IS NOT', VALUE => 'NULL', ENTRYAGGREGATOR => 'AND' );
+
while ( my $user = $users->Next ) {
next if $user->id == RT->SystemUser->id
or $user->id == RT->Nobody->id;