code: def is_authenticated(self):
          
          if not self.token:
              return False
  
          try:
              self.lookup_token()
              return True
          except exceptions.Forbidden:
              return False
          except exceptions.InvalidPath:
              return False
          except exceptions.InvalidRequest:
              return False
docs: Helper method which returns the authentication status of the client
  
          :return:
          :rtype: