Programmatically new Admin in Magento

admin_pass.php

<?php

require_once('app/Mage.php');
umask(0);
Mage::app();

$user = Mage::getModel('admin/user')->setData(array(
    'username' => 'user123',
    'firstname' => 'selman',
    'lastname' => 'selman',
    'email' => 'selamntunc@gmail.com',
    'password' => 'xxxxxx',
    'is_active' => 1
))
    ->save();
$user->setRoleIds(array(1))
    ->setRoleUserId($user->getUserId())
    ->saveRelations();