Create an authorisation

Creates a payment with a unique reference (`pspReference`) and attempts to obtain an authorisation hold. For cards, this amount can be captured or cancelled later. Non-card payment methods typically don't support this and will automatically capture as part of the authorisation. > This endpoint is part of our [classic API integration](https://docs.adyen.com/online-payments/classic-integrations/api-integration-ecommerce). If using a [newer integration](https://docs.adyen.com/online-payments), u...