diff --git a/auth/group.go b/auth/group.go
index 89ea66f..6636dab 100644
--- a/auth/group.go
+++ b/auth/group.go
@@ -24,11 +24,13 @@ type Group struct {
 	UpdatedAt time.Time
 }
 
+var BeforeGroupSave func(*Group) error = func(g *Group) error { return nil }
+
 func (grp *Group) BeforeSave(tx *gorm.DB) (err error) {
 
 	// set displayname
 	if grp.DisplayName == "" {
 		grp.DisplayName = strings.TrimPrefix(grp.Name, SYS_AUTH_PREFIX)
 	}
-	return
+	return BeforeGroupSave(grp)
 }