public function build()
    {
        return $this
            ->subject('Order Confirmation')
            ->to(config('mail.to'), [
                [
                    'name' => $this->order->user->name . ' ' . $this->order->user->lastname,
                    'email' => $this->order->user->email,
                ],
            ])
            ->with([
                'billingAddress' => json_decode($this->order->billing_address, true),
                'shippingAddress' => json_decode($this->order->shipping_address, true),
            ])
            ->markdown('\mails\shop\order_confirmation');
    }