code: def create(self, identity, role_sid=values.unset, attributes=values.unset,
                 friendly_name=values.unset):
          
          data = values.of({
              'Identity': identity,
              'RoleSid': role_sid,
              'Attributes': attributes,
              'FriendlyName': friendly_name,
          })
  
          payload = self._version.create(
              'POST',
              self._uri,
              data=data,
          )
  
          return UserInstance(self._version, payload, service_sid=self._solution['service_sid'], )
docs: Create a new UserInstance
  
          :param unicode identity: The `identity` value that identifies the new resource's User
          :param unicode role_sid: The SID 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 new resource
  
          :returns: Newly created UserInstance
          :rtype: twilio.rest.chat.v2.service.user.UserInstance