code: def verify_token(token, refresh_token=None):
      response = requests.get(
          "https://api.github.com/user",
          headers={"Authorization": "Bearer " + token},
      )
  
      if response.status_code != 200:
          return None
      else:
          return response.json()["login"]
  
imports: import os
  import getpass
  import time
  import json
  import shutil
  import atexit
  import tempfile
  import requests
  import re
  import uuid
  from builtins import input
  import google.auth.transport.requests
  import google.oauth2.id_token
  from studio.util.util import rand_string, check_for_kb_interrupt
  from studio import pyrebase
  from studio.util import logs
label_desc: Use image node_id 11 for calling the GithubAuth obj's underlying member method code with example usage: obj.verify_token(token, refresh_token) and returns: None, response