Perl create mysql database, user, password

my $host = "localhost";
my $port = "3306";
my $user = "root";
my $pass = "111";
my $db_name = "test";
my $db_user = "test";
my $db_pass = "test";

my $dsn = "dbi:mysql::$host:$port";
my $dbh = DBI->connect($dsn, $user, $pass) or die "Unable to connect: $DBI::errstr\n";

$dbh->do("CREATE DATABASE $db_name");
$dbh->do("CREATE USER $db_user\@$host");
$dbh->do("GRANT ALL ON $db_name.* TO $db_user\@$host IDENTIFIED BY '$db_pass'");

$dbh->disconnect();