my $uniq = 0;
sub create_random {
   my @chars = ( "A" .. "Z", "a" .. "z", 0 .. 9, qw(! @ $ % ^ & *) );
   my $user_name = join("", @chars[ map { rand @chars } ( 1 .. 10 ) ]);
   return $user_name . $uniq++;
}