func (client *peerRESTClient) LoadPolicyMapping(userOrGroup string, userType IAMUserType, isGroup bool) error {
	_, err := loadPolicyMappingRPC.Call(context.Background(), client.gridConn(), grid.NewMSSWith(map[string]string{
		peerRESTUserOrGroup: userOrGroup,
		peerRESTUserType:    strconv.Itoa(int(userType)),
		peerRESTIsGroup:     strconv.FormatBool(isGroup),
	}))
	return err
}