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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create(cls, token, custom_headers=None):
 """ Create a request from an ideal transaction. :type user_id: int :param token: The token passed from a site or read from a QR code. :type token: str :type custom_headers: dict[str, str]|None :rtype: BunqResponseTokenQrRequestIdeal """


        if custom_headers is None:
            custom_headers = {}

        request_map = {
            cls.FIELD_TOKEN: token
        }
        request_map_string = converter.class_to_json(request_map)
        request_map_string = cls._remove_field_for_request(request_map_string)

        api_client = client.ApiClient(cls._get_api_context())
        request_bytes = request_map_string.encode()
        endpoint_url = cls._ENDPOINT_URL_CREATE.format(cls._determine_user_id())
        response_raw = api_client.post(endpoint_url, request_bytes,
                                       custom_headers)

        return BunqResponseTokenQrRequestIdeal.cast_from_bunq_response(
            cls._from_json(response_raw, cls._OBJECT_TYPE_POST)
        )