python code gives an SSL error

Trying to use code from README

import jwt
import requests
from datetime import datetime, timedelta

payload = {
    'GUAC_ID': 'connection_id',
    'guac.hostname': '192.168.42.2',
    'guac.protocol': "vnc",
    'guac.port': '5901',
    'guac.password': 'password',
    'exp': datetime.utcnow() + timedelta(seconds=3600)
}

jwtToken = jwt.encode(payload, 'secret', 'HS512')

resp = requests.post('https://guacamole-server-domain/api/tokens', data={'token': jwtToken})
The json response from /api/tokens like:

{
  "authToken": "167b2301e6d274be94b94e885cdab5c98b59b6e5a88872620e69391947f39efa",
  "username": "e4695c00-557c-42bb-b209-8ed522a35d8e",
  "dataSource":"jwt",
  "availableDataSources":["jwt"]
}

gives me an error about SSL certificate

ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate (_ssl.c:1056)

If add resp = requests.post('https://x.x.x.x/api/tokens', data={'token': jwtToken}, verify=False)

it just throughs 403

/usr/local/lib/python3.7/dist-packages/urllib3/connectionpool.py:1020: InsecureRequestWarning: Unverified HTTPS request is being made to host 'x.x.x.x'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
  InsecureRequestWarning,
<Response [403]>

aiden0z / guacamole-auth-jwt

python code gives an SSL error #11