REST API GuidecouponsDelete couponDelete coupon DELETE /coupons/:ID Permanently delete an existing coupon by ID. Requires writable pricelists permission. Request Responses204401403404409412500Successful Deletion (No Content)UnauthorizedResponse HeadersWWW-AuthenticatePreferred authentication scheme (RFC 7235)ForbiddenNot FoundNot Deletable (Conflict)Non-matching ETag (Precondition Failed)Runtime Error (Internal Server Error)