code: def fetch(cls, id, api_key=None, endpoint=None, add_headers=None,
                **kwargs):
          
          if endpoint is None:
              endpoint = cls.get_endpoint()
  
          inst = cls(api_key=api_key)
          parse_key = cls.sanitize_ep(endpoint).split("/")[-1]
          endpoint = '/'.join((endpoint, id))
          data = cls._parse(inst.request('GET',
                                         endpoint=endpoint,
                                         add_headers=add_headers,
                                         query_params=kwargs),
                            key=parse_key)
          inst._set(data)
          return inst
docs: Fetch a single entity from the API endpoint.
  
          Used when you know the exact ID that must be queried.