code: def create_json(self, create_missing=None):
          
          response = self.create_raw(create_missing)
          response.raise_for_status()
          return response.json()
docs: Create an entity.
  
          Call :meth:`create_raw`. Check the response status code, decode JSON
          and return the decoded JSON as a dict.
  
          :return: A dict. The server's response, with all JSON decoded.
          :raises: ``requests.exceptions.HTTPError`` if the response has an HTTP
              4XX or 5XX status code.
          :raises: ``ValueError`` If the response JSON can not be decoded.