def next_page_token(self, response: requests.Response) -> Optional[Mapping[(str, Any)]]:
    json_response = response.json()
    next_cursor = json_response.get('response_metadata', {}).get('next_cursor')
    if next_cursor:
        return {'cursor': next_cursor}
def next_page_token(self, response: requests.Response) -> Optional[Mapping[(str, Any)]]:
    json_response = response.json()
    next_cursor = json_response.get('response_metadata', {}).get('next_cursor')
    if next_cursor:
        return {'cursor': next_cursor}