code: function (invoiceitem, cb) {
  
  		Invoiceitem.destroy(invoiceitem.id)
  	    .exec(function (err, destroyedInvoiceitems){
  	      if (err) return cb(err);
  	      if (!destroyedInvoiceitems) return cb(null, null);
  	      Invoiceitem.afterStripeInvoiceitemDeleted(destroyedInvoiceitems[0], function(err, invoiceitem){
  	      	cb(err, invoiceitem);
  	      });
  	    });
  	}
docs: Stripe Webhook invoiceitem.deleted