code: def __setitem__(self, key: str, value: str):
      self._tokens[key] = value
  
imports: from typing import Optional, Dict, Tuple
  import base64
  import collections.abc
  import os
  import json
  import logging
  from hailtop.config import get_deploy_config
  from hailtop.utils import first_extant_file
label_desc: Use image node_id 5 for calling the Tokens obj's underlying member method code with example usage: obj.__setitem__(key, value) without return types