code: def update(self, role_sid=values.unset, attributes=values.unset,
                 friendly_name=values.unset):
          
          return self._proxy.update(role_sid=role_sid, attributes=attributes, friendly_name=friendly_name, )
docs: Update the UserInstance
  
          :param unicode role_sid: The SID id of the Role assigned to this user
          :param unicode attributes: A valid JSON string that contains application-specific data
          :param unicode friendly_name: A string to describe the resource
  
          :returns: Updated UserInstance
          :rtype: twilio.rest.chat.v2.service.user.UserInstance