def METHOD_NAME(self) -> str:
    response_auth = requests.get(self._open_id_config_url, proxies=self._connection.proxies)
    response_auth_json = _decode_json_response_dict(response_auth, "Get token endpoint")
    assert response_auth_json is not None
    token_endpoint = response_auth_json["token_endpoint"]
    assert isinstance(token_endpoint, str)
    return token_endpoint