public function allLoggedIn(): Collection
    {
        return DB::table('user')
            ->join('session', 'session.user_id', '=', 'user.user_id')
            ->where('user.user_id', '>', 0)
            ->orderBy('real_name')
            ->select(['user.*'])
            ->distinct()
            ->get()
            ->map(User::rowMapper());
    }