func (p *PuppetService) RoomCreate(contactIDList []string, topic string) (string, error) {
    log.Tracef("PuppetService roomCreate(%s, %s)\n", contactIDList, topic)
    response, err := p.grpcClient.RoomCreate(context.Background(), &pbwechatypuppet.RoomCreateRequest{
        ContactIds: contactIDList,
        Topic:      topic,