def next_page_token(self, response: requests.Response) -> Optional[Mapping[(str, Any)]]:
    response_json = response.json()
    if response_json.get('next_page'):
        next_query_string = urllib.parse.urlsplit(response_json.get('next_page')).query
        params = dict(urllib.parse.parse_qsl(next_query_string))
        return params
def next_page_token(self, response: requests.Response) -> Optional[Mapping[(str, Any)]]:
    response_json = response.json()
    if response_json.get('next_page'):
        next_query_string = urllib.parse.urlsplit(response_json.get('next_page')).query
        params = dict(urllib.parse.parse_qsl(next_query_string))
        return params