add todo comment in coupon event

core/lib/Thelia/Action/Coupon.php

@@ -124,6 +124,7 @@ class Coupon extends BaseAction implements EventSubscriberInterface
             // @todo insert false product in cart with the name of the coupon and the discount as negative price
 
             // Decrement coupon quantity
+            // @todo move this part in after order event
             $couponQuery = CouponQuery::create();
             $couponModel = $couponQuery->findOneByCode($coupon->getCode());
             $couponManager->decrementeQuantity($couponModel);