How to get a YooMoney token (Yandex money)?

Question

YuMoney

I do everything by api.
The essence of the problem: Yandex Money does not send a token to my server.

API

https://yoomoney.ru/docs/wallet/using-api/authoriz...

That is, I send a redirect to the documentation, but I do not receive an http request.
The code:

from flask import Flask, request, redirect
import logging
logging.basicConfig(filename="logs.log", level=logging.INFO)
app = Flask(__name__)

@app.route('/')
def get_onetime_code():
    logging.info(request.url)
    data = request.args
    code = data['code']
    client_id = 'client'
    return redirect('https://yoomoney.ru/oauth/token?code={}&client_id={}&grant_type=authorization_code&redirect_uri=http://me.pythonanywhere.com/reg'.format(code, client_id), code=302)

@app.route('/reg')
def get_code():
    logging.info(request.url)
    data = request.args
    f = open('data.txt', 'w')
    f.write(str(data['code']))
    f.close()
    return 'ok'
if __name__ == '__main__':
    app.run(debug = True)

Logs:
INFO:root:http://me.pythonanywhere.com/?code=code
While the temporary code successfully arrives at the server.