if change == nil {
		return errSRInvalidRequest(errInvalidArgument)
	}
	// skip overwrite of local update if peer sent stale info
	if !updatedAt.IsZero() {
		if ui, err := globalIAMSys.GetUserInfo(ctx, change.AccessKey); err == nil && ui.UpdatedAt.After(updatedAt) {
			return nil
		}
	}

	var err error

					err = zb0002.Bins[zb0003].DecodeMsg(dc)
					if err != nil {
						err = msgp.WrapError(err, zb0001, "Bins", zb0003)
						return
					}
				}
			case "UpdatedAt":
				zb0002.UpdatedAt, err = dc.ReadTime()
				if err != nil {
					err = msgp.WrapError(err, zb0001, "UpdatedAt")
					return
				}
			default:
				err = dc.Skip()
				if err != nil {
					err = msgp.WrapError(err, zb0001)
					return
				}
			}
		}

		cache.iamUserGroupMemberships[member] = gset
	}

	cache.updatedAt = time.Now()
	return gi.UpdatedAt, nil
}

// RemoveUsersFromGroup - removes users from group, deleting it if it is empty.
func (store *IAMStoreSys) RemoveUsersFromGroup(ctx context.Context, group string, members []string) (updatedAt time.Time, err error) {
	if group == "" {
		return updatedAt, errInvalidArgument
	}

	cache := store.lock()

	clone := lastDayTierStats{
		UpdatedAt: l.UpdatedAt,
	}
	copy(clone.Bins[:], l.Bins[:])
	return clone
}

func (l lastDayTierStats) merge(m lastDayTierStats) (merged lastDayTierStats) {
	cl := l.clone()
	cm := m.clone()

	if cl.UpdatedAt.After(cm.UpdatedAt) {
		cm.forwardTo(cl.UpdatedAt)
		merged.UpdatedAt = cl.UpdatedAt
	} else {
		cl.forwardTo(cm.UpdatedAt)
		merged.UpdatedAt = cm.UpdatedAt
	}

		t.Fatalf("failed to onconflict create user, got error %v", err)
	} else {
		var user3 User
		DB.First(&user3, user.ID)
		if user3.UpdatedAt.UnixNano() == user2.UpdatedAt.UnixNano() {
			t.Fatalf("failed to update user's updated_at, old: %v, new: %v", user2.UpdatedAt, user3.UpdatedAt)
		}
	}
}

func TestUpsertSlice(t *testing.T) {
	langs := []Language{
		{Code: "upsert-slice1", Name: "Upsert-slice1"},

	if !sys.Initialized() {
		return updatedAt, errServerNotInitialized
	}

	updatedAt, err = sys.store.UpdateServiceAccount(ctx, accessKey, opts)
	if err != nil {
		return updatedAt, err
	}

	sys.notifyForServiceAccount(ctx, accessKey)
	return updatedAt, nil
}

	} else {
		user.Account.UpdatedAt = user4.Account.UpdatedAt
		CheckUser(t, user4, user)
	}

	t.Run("Polymorphic", func(t *testing.T) {
		pet := Pet{Name: "create"}

		if err := DB.Create(&pet).Error; err != nil {
			t.Fatalf("errors happened when create: %v", err)
		}

		pet.Toy = Toy{Name: "Update-HasOneAssociation-Polymorphic"}

		Type:      madmin.SRBucketMetaTypePolicy,
		Bucket:    bucket,
		Policy:    bucketPolicyBytes,
		UpdatedAt: updatedAt,
	}))

	// Success.
	writeSuccessNoContent(w)
}

// DeleteBucketPolicyHandler - This HTTP handler removes bucket policy configuration.
func (api objectAPIHandlers) DeleteBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {

	replLogIf(ctx, globalSiteReplicationSys.BucketMetaHook(ctx, madmin.SRBucketMeta{
		Type:      madmin.SRBucketMetaTypeSSEConfig,
		Bucket:    bucket,
		SSEConfig: &cfgStr,
		UpdatedAt: updatedAt,
	}))

	writeSuccessResponseHeadersOnly(w)
}

// GetBucketEncryptionHandler - Returns bucket policy configuration
// https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketEncryption.html

	replLogIf(ctx, globalSiteReplicationSys.BucketMetaHook(ctx, madmin.SRBucketMeta{
		Type:       madmin.SRBucketMetaTypeVersionConfig,
		Bucket:     bucket,
		Versioning: &cfgStr,
		UpdatedAt:  updatedAt,
	}))

	writeSuccessResponseHeadersOnly(w)
}

// GetBucketVersioningHandler - GET Bucket Versioning.
// ----------