hubs_stripe_backend.js

const express = require("express");
const app = express();
const fs = require('fs');
const fetch = require('node-fetch');

const tokenFile = './.ret.credentials'
const token = JSON.parse(fs.readFileSync(tokenFile, 'utf8')).token;
const accountURL = 'https://myhubsURL.com/api/v1/accounts'

app.use(express.json())

var customers = {}

// should discard anything not matching
// https://stripe.com/docs/webhooks/signatures https://stripe.com/docs/ips
app.post("/stripe-webhook", (req, res) => {
  event = req.body
  switch (event.type) {
    case 'checkout.session.completed':
      var email = customers[event.data.object.customer].email
      var name = customers[event.data.object.customer].name
      console.log('creating account for', email, name, 'via the account API')
      registerHubsAccountFromEmail(email, name)
      break;
    case 'payment_intent.succeeded':
      const paymentIntent = event.data.object;
      if (typeof customers[paymentIntent.customer] === "undefined") customers[paymentIntent.customer] = {}
      if (paymentIntent && paymentIntent.charges && paymentIntent.charges.data && paymentIntent.charges.data.length)
        customers[paymentIntent.customer].receipt_url = paymentIntent.charges.data[0].receipt_url
      console.log('payment succeeded!')
      // Then define and call a method to handle the successful payment intent.
      // handlePaymentIntentSucceeded(paymentIntent);
      break;
    case 'payment_method.attached':
      const paymentMethod = event.data.object;
      //console.log('paymentMethod', paymentMethod)
      customers[paymentMethod.customer] = {}
      customers[paymentMethod.customer].email = paymentMethod.billing_details.email
      customers[paymentMethod.customer].name = paymentMethod.billing_details.name

      // Then define and call a method to handle the successful attachment of a PaymentMethod.
      // handlePaymentMethodAttached(paymentMethod);
      break;
    // ... handle other event types
    default:
      // Unexpected event type
      return res.status(400).end();
  }
  // Return a response to acknowledge receipt of the event
  res.json({received: true});
});


app.listen(20002, () => {
  console.log("Hubs Stripe microservice running on port 20002");
});

function registerHubsAccountFromEmail(email, name){
        console.log('requesting account creation for', email)
        fetch(accountURL, {
                method: 'POST',
                headers: {
                        'Content-Type': 'application/json',
                        'Accept': 'application/json',
                        'Authorization': 'bearer ' + token
                },
                body: JSON.stringify( {"data": [{ "email": email, "name": name } ] })
        }).then(reply => {
                console.log('success');
                console.log(reply);
        }).catch(err => {
                console.log('error');
                console.log(err);
        });
}

Thank you :)
We WILL have our hubs shop experience :) It's the right time !