Enables in‑cash ATM payments via a simple reference‑based flow:

1. Call the Lemonway DirectKit API to initialize a credit transaction for a payment account and receive a unique payment reference.
2. Provide this reference to the end customer.
3. The customer visits an ATM and enters the reference to complete the payment.
4. Once the payment is settled, your system receives a notification of the successful credit.

Important: Whenever you see accountId in a path or body parameter, enter your wallet’s ID.