func InitMgr(etcdClient *etcd.Client) {
	mgr.etcdClient = etcdClient
}
InitMgr initializes a config manager.
package configer
import (
	"context"
	"encoding/json"
	"github.com/henrylee2cn/erpc/v6"
	micro "github.com/xiaoenai/tp-micro/v6"
	"github.com/xiaoenai/tp-micro/v6/model/etcd"
)
var mgr = struct {
	etcdClient *etcd.Client
}{}