Use Adyen-managed network tokenization to improve authorization rates on recurring card payments

Steps

1. Contact Adyen Support to enable network tokenization on your merchant account; ensure you have the Checkout webservice role and Merchant Recurring role on your API credential.
2. No integration change is required for Adyen-managed tokens: continue using your standard `/payments` request with a `storedPaymentMethodId` and Adyen will automatically swap the token for a network token before forwarding authorization.
3. To receive data about network token usage, go to Customer Area > Developers > Additional data and enable 'Include the retry attempts' (acquirer section) and 'Network token bin and summary for tokenised payments' (card section).
4. If you manage your own network tokens from card schemes, make the initial payment with `paymentMethod.type: networkToken` and supply `mpiData.tokenAuthenticationVerificationValue` (the TAVV cryptogram), `mpiData.directoryResponse: Y`, and `mpiData.authenticationResponse: Y`.
5. Save the `networkTxReference` value from the initial payment response; pass it in all subsequent unscheduled or subscription payments to maintain network compliance.
6. For co-badged network tokens in the US, call `POST /cardDetails` to list available networks then specify the preferred route using `paymentMethod.brand` in the `/payments` request.