# USER MODEL

    public function isOnline()
    {
        $rtype = $this->accounting()->latest('ts')->limit(1)->pluck('rtype')->first();

        if ($rtype == 'Alive') {
            return true;
        }
        return false;
    }

# CONTROLLER

    if ($user->isOnline()) {
        $info[] = 'Online';
    } else {
        $info[] = 'Offline';
    }