@Bean
    public EtcdClient etcdClient(final EtcdConfig etcdConfig) {
        Client client = Client.builder()
                .endpoints(etcdConfig.getUrl().split(","))
                .build();
        return new EtcdClient(client);
    }
register etcd Client in spring ioc.

@param etcdConfig the etcd configuration
@return EtcdClient {@linkplain EtcdClient}
shenyu-spring-boot-starter/shenyu-spring-boot-starter-sync-data-center/shenyu-spring-boot-starter-sync-data-etcd/src/main/java/org/apache/shenyu/springboot/sync/data/etcd/EtcdSyncDataConfiguration.java