Get existing payment link

{
    "id": "04263b21-ec89-4bab-9b36-b0807b27c9e1",
    "merchantId": "c45d1500-2184-4058-94c2-8a48f2efca62",
    "status": "completed",
    "dataCollection": [
        "name",
        "phoneNumber"
    ],
    "amount": {
        "units": 3000,
        "currencyCode": "GBP"
    },
    "link": "https://lopay.app/08adf/b9f0bc31-4209-4bbb-bf1d-2ea124031056",
    "reference": "INV12345",
    "description": "Payment for INV#1003 (Peter Jones)",
    "payments": [
        {
            "id": "662a8074-6959-4793-8ac9-a1f03d5f1181",
            "type": "card",
            "taxes": [
                {
                    "name": "VAT (20%)",
                    "inclusive": true,
                    "rate": "20.00",
                    "amount": {
                        "units": 500,
                        "currencyCode": "GBP"
                    }
                }
            ],
            "tip": {
                "units": 0,
                "currencyCode": "GBP"
            },
            "subtotal": {
                "units": 3000,
                "currencyCode": "GBP"
            },
            "total": {
                "units": 3000,
                "currencyCode": "GBP"
            },
            "createdAt": "2023-03-08T23:12:32.686Z",
            "updatedAt": "2023-03-08T23:12:32.686Z"
        }
    ],
    "returnUrl": null,
    "taxes": [
        {
            "name": "VAT (20%)",
            "inclusive": true,
            "rate": "20.00",
            "amount": {
                "units": 500,
                "currencyCode": "GBP"
            }
        }
    ],
    "createdAt": "2023-03-09T06:01:24.752Z",
    "updatedAt": "2023-03-09T06:12:32.768Z"
}