code: def _create_node(self, index: int, name: str, external_id: Optional[str] = None) -> SpotifyArtistNode:
          
          if external_id is None:
              graph: SpotifyArtistGraph = self._graph
              items: List[NameExternalIDPair] = graph.client.search_artists_by_name(name)
              for item in items:
                  if item.name == name:
                      external_id = item.external_id
                      break
  
          return SpotifyArtistNode(graph=self._graph, index=index, name=name, external_id=external_id)
docs: Returns a new `SpotifyArtistNode` instance with the given index and name.
  
          Arguments:
              index (int): The index of the node to create.
              name (str): The name of the node to create.
              external_id (Optional[str]): The external ID of the node.