Sellsy API python with OAuth

sellsy.py

# -*- coding: utf-8 -*-

import json
import requests
from requests_oauthlib import OAuth1
from oauthlib.oauth1 import SIGNATURE_PLAINTEXT, SIGNATURE_TYPE_BODY

consumer_token = '***'
consumer_secret = '***'
user_token = '***'
user_secret = '***'

url = 'https://apifeed.sellsy.com/0/'
auth = OAuth1(
    consumer_token,
    consumer_secret,
    user_token,
    user_secret,
    signature_method=SIGNATURE_PLAINTEXT,
    signature_type=SIGNATURE_TYPE_BODY,
)


payload = {'method': 'Infos.getInfos', 'params': {}}
response = requests.post(url, data={
    'request': 1,
    'io_mode': 'json',
    'do_in': json.dumps(payload)
}, auth=auth, headers={'content-type': 'application/json'})
print(response.status_code)
print(response.json())