code: def varify_user_lock(repository_path, session_token):
      
  
      with open(cpjoin(repository_path, 'user_file'), 'r') as fd2:
          content = fd2.read()
          if len(content) == 0: return False
          try: res = json.loads(content)
          except ValueError: return False
          return res['session_token'] == session_token and int(time.time()) < int(res['expires'])
      return False
docs: Verify that a returning user has a valid token and their lock has not expired