'Update the UserInstance
:param unicode role_sid: The role_sid
:param unicode attributes: The attributes
:param unicode friendly_name: The friendly_name
:returns: Updated UserInstance
:rtype: twilio.rest.chat.v1.service.user.UserInstance'

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)
