Currently, Trafft allows parameters such as customerFirstName, customerLastName, customerEmail, customerPhone, and customFields to be passed in the booking URL, but there is no parameter for coupon codes (couponCode). I would like to request the addition of a feature that allows a coupon to be included as a parameter in the booking link (e.g., ?couponCode=DISCOUNT20). This way, when sharing a link with a client, the discount would be applied automatically without the client having to manually enter the code. This would greatly facilitate promotions and marketing campaigns.