cctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
	defer cancel()

	r, err := ies.client.Get(cctx, iamConfigGroupsPrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
	if err != nil {
		return err
	}

	groups := etcdKvsToSet(iamConfigGroupsPrefix, r.Kvs)

	// Reload config for all groups.
	for _, group := range groups.ToSlice() {