Send Notifications On User Registration

/**

 * Notify admin and user when a user registers with Charitable.

 *

 * @param   array[] $fields

 * @param   Charitable_Donation_Form $form

 * @return  array[]

 */

function charitable_notify_new_user($user_id, $values) {

	wp_new_user_notification( $user_id, null, 'admin' );

}

add_action('charitable_after_insert_user', 'charitable_notify_new_user', 10, 2);