properly copy group users

management/server/types/group.go

@@ -48,6 +48,14 @@ type GroupUser struct {
 	UserID    string `gorm:"primaryKey"`
 }
 
+func (g *GroupUser) Copy() *GroupUser {
+	return &GroupUser{
+		AccountID: g.AccountID,
+		GroupID:   g.GroupID,
+		UserID:    g.UserID,
+	}
+}
+
 func (g *Group) LoadGroupPeers() {
 	g.Peers = make([]string, len(g.GroupPeers))
 	for i, peer := range g.GroupPeers {

management/server/types/user.go

@@ -223,8 +223,11 @@ func (u *User) Copy() *User {
 	var groupUsers []*GroupUser
 	if u.Groups != nil {
 		groupUsers = make([]*GroupUser, len(u.Groups))
-		copy(groupUsers, u.Groups)
+		for i, groupUser := range u.Groups {
+			groupUsers[i] = groupUser.Copy()
+		}
 	}
+
 	var autoGroups []string
 	if u.AutoGroups != nil {
 		autoGroups = make([]string, len(u.AutoGroups))