Use Form Info from booking as payment info

Hello everyone,
I’m working with wix bookings, trying to set up a custom flow where a user selects a service, and fills in a custom form of input fields that I’m using as booking info.

This part is working and a booking is generated.
The problem is the payment part, I need to skip the user info page on wix pay page.
I tried building the payment on wix pay, and wix pay backend but since bookings checkout already triggers the payment window I was doubling the payment and had to remove it.

RESUME - what do I need? to use input info that is used as bookingInfo to be filled on the payment form so the user only fills it in once.

This is happening on a lightbox and here is the code:

import wixWindow from 'wix-window';
import { session } from 'wix-storage';
import wixBookings from 'wix-bookings';

$w.onReady(function () {

    let slotIndex = session.getItem("slotIndex");
    let availableSlots
    let itemId = session.getItem("serviceId");
    let sessionId = session.getItem("sessionId");

    wixBookings.getServiceAvailability(itemId)
        .then((availability) => {
            availableSlots = availability.slots;
        })

    $w('#bookButton').onClick(() => {

        let formFieldValues = [{
            "_id": "00000000-0000-0000-0000-000000000001", 
            "value": $w("#firstName").value + " " + $w("#lastName").value,
        }, {
            "_id": "00000000-0000-0000-0000-000000000002", 
            "value": $w("#email").value,
        }, {
            "_id": "00000000-0000-0000-0000-000000000003", 
            "value": $w("#telefone").value,
        }, {
            "_id": "131fc6db-2bb1-4e2b-bf90-081f12f4928b",                          
            "value": sessionId
        }];

        let bookingInfo = {
            "slot": availableSlots[slotIndex],
            "formFields": formFieldValues
        };
        
        wixBookings.checkoutBooking(bookingInfo)
            .then((results) => {
                $w("#confirmationText").text = `Booking ID: ${results.bookingId} Status: ${results.status}`;
            });
      })
})

export function button2_click(event) {
    wixWindow.lightbox.close({
    })
}     

Thank you in advance.