text: from typing import Optional
  
  
  class TeaClientConfig:
      def __init__(
          self,
          server_url: str = "http:/127.0.0.1:8000",
          api_version: int = 0,
          token_access: Optional[str] = None,
          token_refresh: Optional[str] = None,
      ):
          self.server_url = server_url
          self.api_version = api_version
          self.token_access = token_access
          self.token_refresh = token_refresh
  
      def save(self):
          pass
  