code: def update_user(self, user_id, **kwargs):
          
          properties = {}
  
          for attr, value in kwargs.items():
              properties[self._underscore_to_camelcase(attr)] = value
  
          data = {
              "properties": properties
          }
  
          response = self._perform_request(
              url='/um/users/%s' % user_id,
              method='PUT',
              data=json.dumps(data))
  
          return response
docs: Updates a user.
  
          :param      user_id: The unique ID of the user.
          :type       user_id: ``str``