create user in wordpress

gistfile1.txt

    $user = array(
      'user_login'  => admin_theme_user_manager::generate_username($username),
      'user_pass'   => wp_generate_password(5, false),
      'user_email'  => $subscriber['user_email'],
      'first_name'  => $subscriber['first_name'],
      'last_name'   => $subscriber['last_name'],
    );
    $user_id = wp_insert_user($user);

    if(is_wp_error($user_id)){
      return false;
    }
    
    return $user_id;