Enable Sale Order creation with Deals (Coupon usage) through DEAR API

Hello DEAR tech team,

On behalf of my company, I would like to request a feature to enable us to create a sale order with deals (using coupon code) through DEAR API. We currently use DEAR API to generate our Sale Orders, however since we can't do discounts for coupon usages, our calculations for accounting books are all messed up. I also attached a picture of which feature I'm asking for, which you already have if we access DEAR through dashboard interface.

Best Regards,

Jo