Ultimate Member Woocommerce extension - Change User Status on completed or successful transaction

Ultimate Member Woocommerce extension - Change User Status on completed or successful transaction

<?php
add_action('woocommerce_order_status_completed', 'um_woocommerce_approve_user_status');
function um_woocommerce_approve_user_status( $order_id ){
  global $ultimatemember;

   $order = new WC_Order( $order_id );
   $user_id = (int)$order->user_id;
   $items = $order->get_items();

   um_fetch_user( $user_id );

   $ultimatemember->user->approve();

   //$ultimatemember->user->pending();  // Pending

   //$ultimatemember->user->reject(); // Reject

   //$ultimatemember->user->email_pending(); // Email Pending

   //$ultimatemember->user->deactivate();  // Deactivate

   // forcefully flush the cache
   $ultimatemember->user->remove_cache( $user_id );

   return $order_id;
}
?>