code: def refresh(self, token=None):
      if token is None:
          token = self.token
  
      base_path = self.server_base_path
      out = requests.post(
          f"{base_path}/api/v2/auth/token/refresh",
          verify=self.certificate_validation,
          json={"token": token},
      )
      json_response = None
      try:
          json_response = out.json()
          if not ("token" in json_response):
              raise Exception(out.text)
      except Exception:
          logger.error("Error: %s", out, exc_info=True)
          raise Exception(out.text)
  
      self.token = out.json()["token"]
      return self
  
imports: from typing import List, Optional
  import io, pyarrow, requests, sys
  from graphistry.privacy import Mode, Privacy
  from .ArrowFileUploader import ArrowFileUploader
  from .util import setup_logger
label_desc: Use image node_id 33 for calling the ArrowUploader obj's underlying member method code with example usage: obj.refresh(token) and returns: self