void PerformListMember()
    {
        message       = "Getting group members...";
        ButtonEnabled = false;

        currentGroup.ListMembers((IList <KiiUser> list, Exception e) =>
        {
            ButtonEnabled = true;
            if (e != null)
            {
                message = "Failed to get members " + e.Message;
                return;
            }
            members = list;
            message = "List members succeeded";
        });
    }