code: def apply_for_token():
      url = get_server_url() + "/sts/"
      res = requests.post(url=url).json()
  
      return res
  
file_path: VisualDL/visualdl/server/serve.py
imports: import requests
  import json
  import os
  from visualdl.io import bfile
  from visualdl.reader.reader import is_VDLRecord_file
  from visualdl.utils.dir import CONFIG_PATH
  from visualdl.server.log import logger
label_desc: Use image node_id 2 for calling a global function with example usage: apply_for_token() and returns: res