We recently made changes to the process of granting discounts and extending trials for apps that are monetized through monday:
Instead of granting discounts and extending trials using the account ID, you must now use the account slug. You can obtain the account slug from your webhooks or by querying the account through the API.
This change is extremely important because it enables you to grant discounts and extend trials for customers across different regions! Previously, the system would not allow you to grant a discount or extend a trial for a customer who sits in a different region than you. With this update, it doesn't matter what region you or your customers are in.