Returns a payment link for a gift card or directly creates and sends a gift card based on the `priceAfterDiscount` value.
If `priceAfterDiscount` is `null` or `0`, the gift card will be immediately created and sent (if sending has been requested on the `recipient` field), and the response will include the generated gift card details. In this case, the `ignorePayment` field must be set to `true`.
If `priceAfterDiscount` is greater than `0`, a payment link will be generated, and upon successful payment, the gift card will be created.
This method is highly flexible yet can be simplified. The minimum required fields for an immediate gift card issuance can be as simple as:
``{"giftCardCreditAmount": 500, "buyer": {"name": "John Doe", "phoneNumber": "0508116811"}, "ignorePayment": true}``

If a successful payment webhook is required, the `paymentSuccessWebhook` (see the model for a description) field should be set. The webhook supports both `get` and `post` methods, if a method is not provided, it will default to `post`. When `get` is used, the payload will be appended to the URL as query parameters. Supported fields are: `paymentLinkId`, `giftCardUsageAmount`, `amountCharged`, and `cardLastFourDigits`, and any additional `constants` that are required (that will be simply attached to the payload/url). If a different field mapping is required, it can be provided in the `fieldsMap` field. As and example `{"fieldsMap": {"paymentLinkId": "paymentId"}}` will map the easybizy's field `paymentLinkId` to your `paymentId` field in the payload/url. If unsupported fields are provided, they will be ignored.
For a more detailed model, refer to the Model section in the description, following the example below.

⚠️ **Important Notice:** If `priceAfterDiscount` is `null` or `0`, the system will **immediately create and send** a gift card. This effectively means issuing real money, so extra caution must be taken to ensure correctness and prevent unintended issuance. Using this direct method, requires CREATE permission for the gift-card entity.