public function getCoupon($code)
    {
        Stripe::setApiKey(config('services.stripe.secret'));

        if (count(Spark::plans()) === 0) {
            abort(404);
        }

        try {
            return response()->json(
                Coupon::fromStripeCoupon(StripeCoupon::retrieve($code))
            );
        } catch (Exception $e) {
            abort(404);
        }
    }