braintree как создать авторизацию на стороне сервера, а не на стороне клиента python

Question

Привет! Я интегрирую мозговое дерево в свою сторону, что я хочу вместо генерации авторизации на стороне клиента. Я хочу сделать это на стороне сервера. Это на стороне сервера.

from flask import Flask, redirect, url_for, render_template, request, flash

import os
from os.path import join, dirname
from dotenv import load_dotenv
import braintree
from gateway import generate_client_token, transact, find_transaction

load_dotenv()

app = Flask(__name__)
app.secret_key = os.environ.get('APP_SECRET_KEY')

PORT = int(os.environ.get('PORT', 4567))

TRANSACTION_SUCCESS_STATUSES = [
    braintree.Transaction.Status.Authorized,
    braintree.Transaction.Status.Authorizing,
    braintree.Transaction.Status.Settled,
    braintree.Transaction.Status.SettlementConfirmed,
    braintree.Transaction.Status.SettlementPending,
    braintree.Transaction.Status.Settling,
    braintree.Transaction.Status.SubmittedForSettlement
]

@app.route('/', methods=['GET'])
def index():
    return redirect(url_for('new_checkout'))

@app.route('/checkouts/new', methods=['GET'])
def new_checkout():
    client_token = generate_client_token()
    return render_template('checkouts/new.html', client_token=client_token)

@app.route('/checkouts/<transaction_id>', methods=['GET'])
def show_checkout(transaction_id):
    transaction = find_transaction(transaction_id)
    result = {}
    if transaction.status in TRANSACTION_SUCCESS_STATUSES:
        result = {
            'header': 'Sweet Success!',
            'icon': 'success',
            'message': 'Your test transaction has been successfully processed. See the Braintree API response and try again.'
        }
    else:
        result = {
            'header': 'Transaction Failed',
            'icon': 'fail',
            'message': 'Your test transaction has a status of ' + transaction.status + '. See the Braintree API response and try again.'
        }

    return render_template('checkouts/show.html', transaction=transaction, result=result)

@app.route('/checkouts', methods=['POST'])
def create_checkout():
    result = transact({
        'amount': request.form['amount'],
        'payment_method_nonce': request.form['payment_method_nonce'],
        'options': {
            "submit_for_settlement": True
        }
    })

    if result.is_success or result.transaction:
        return redirect(url_for('show_checkout',transaction_id=result.transaction.id))
    else:
        for x in result.errors.deep_errors: flash('Error: %s: %s' % (x.code, x.message))
        return redirect(url_for('new_checkout'))

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=PORT, debug=True)

, и это страница. где он создает авторизацию в java скриптовом разделе

{% extends 'layout.html' %}
{% block content %}

<div class="wrapper">
  <div class="checkout container">

    <header>
      <h1>Hi, <br>Let's test a transaction</h1>
      <p>
        Make a test payment with Braintree using PayPal or a card
      </p>
    </header>

    <form id="payment-form" method="post" action="/checkouts">
      <section>
        <label for="amount">
          <span class="input-label">Amount</span>
          <div class="input-wrapper amount-wrapper">
            <input id="amount" name="amount" type="tel" min="1" placeholder="Amount" value="10">
          </div>
        </label>

        <div class="bt-drop-in-wrapper">
          <div id="bt-dropin"></div>
        </div>
      </section>

      <input type="hidden" id="nonce" name="payment_method_nonce" />
      <button class="button" type="submit" id="submit-button"><span>Test Transaction</span></button>
    </form>

  </div>
</div>

<script src="https://js.braintreegateway.com/web/dropin/1.22.1/js/dropin.min.js"></script>
<script>
  var form = document.querySelector('#payment-form');
  var client_token = '{{ client_token }}';

  braintree.dropin.create({
    authorization: client_token,
    container: '#bt-dropin',
    paypal: {
      flow: 'vault'
    }
  }, function (createErr, instance) {
    form.addEventListener('submit', function (event) {
      event.preventDefault();

      instance.requestPaymentMethod(function (err, payload) {
        if (err) {
          console.log('Error', err);
          return;
        }

        // Add the nonce to the form and submit
        document.querySelector('#nonce').value = payload.nonce;
        form.submit();
      });
    });
  });
</script>
{% endblock %}

, поэтому я хочу сделать

 braintree.dropin.create({
    authorization: client_token,

авторизацию на сервере вместо клиента