post https://{environment}.joinforage.app/api/payments//collect_pin_backend/
This endpoint is only relevant to Forage SDK integrations.
Only use this endpoint during sandbox testing.
It cannot be used in production.
A POST request to /payments/{payment_ref}/collect_pin_backend/ programmatically associates a test PIN with an existing Payment object.
Use this endpoint to automate sandbox testing when you're building an integration that defers payment capture to the server.