New Feature Opened: PAY API!

Hi, I am using the wix-pay-backend with Paypal, but the onPaymentUpdate( ) does not works.

createPayment( ) works fine and the payment process starts with no problem including PayPal.

The following code is on the event.jsw file on the Backend Section, but it does not get fired:

export function wixPay_onPaymentUpdate(event) {
// Step 8 - Handle additional status updates using
// the onPaymentUpdate() event.
let paymentId = event.payment.id;
let newTransactionStatus = event.status;
let userInfo = event.userInfo;

console.log(‘event’+ JSON.stringify(event)); // also console.log does not works

Can you help, I am stucked with a integration project for my most important client.