Mail admin on registration

<?php

// ceramic
/**
 * Send e-mail to admin when a new user is registered
 */
add_action('woocommerce_created_customer', function($customer_id) {
	$user = get_user_by('id', $customer_id);

	$to = 'info@ceramicnature.com';
	$headers = array('Content-Type: text/html; charset=UTF-8');
  $subject = 'Nieuwe account registratie op Ceramic Nature';
  $message = "Nieuwe account registratie: ". $user->user_email. '<br />';
	$message .= "<a href='". get_site_url() ."/wp-admin/users.php?role=wpau_unapproved'>Klik hier</a> om het account goed te keuren";

  wp_mail($to, $subject, $message, $headers);
});