Add User Admin to WP

function wpb_admin_account(){
  $user = 'username';
  $pass = 'password';
  $email = 'carla@baldwinwebdesign.com';
  if ( !username_exists( $user ) && !email_exists( $email ) ) {
    $user_id = wp_create_user( $user, $pass,$email );
   $user = new WP_User( $user_id );
   $user->set_role( 'administrator' );
  }
 }

add_action('init','wpb_admin_account');