curl --request GET \
  --url https://api.voltview.co.uk/v1/suppliers/references/{referenceId}/accountsSitesMeters \
  --header 'x-api-key: <api-key>'

{
  "businessId": "<string>",
  "accounts": [
    {
      "id": "<string>",
      "supplier": "<string>",
      "sites": [
        {
          "id": "<string>",
          "accountId": "<string>",
          "referenceId": "<string>",
          "name": "<string>",
          "address": "<string>",
          "supplyTypes": [
            "electricity"
          ],
          "meters": [
            {
              "mpanMprn": "<string>",
              "meterSerialNumber": "<string>",
              "utilityType": "electricity"
            }
          ]
        }
      ]
    }
  ]
}