Find service associated with gateway account ID

Example response

{
  "_links": [
    {
      "href": "https://an.example.link",
      "method": "GET",
      "rel": "self"
    }
  ],
  "archived_date": "2023-04-09T18:07:46.568Z",
  "collect_billing_address": true,
  "created_date": "2022-04-01T12:07:46.568Z",
  "current_go_live_stage": "NOT_STARTED",
  "current_psp_test_account_stage": "NOT_STARTED",
  "custom_branding": {
    "css_url": "css url",
    "image_url": "image url"
  },
  "default_billing_address_country": "GB",
  "external_id": "7d19aff33f8948deb97ed16b2912dcd3",
  "gateway_account_ids": [
    "1"
  ],
  "merchant_details": {
    "address_city": "London",
    "address_country": "GB",
    "address_line1": "Address line 1",
    "address_line2": "Address line 2",
    "address_postcode": "E1 8XX",
    "email": "email@example.com",
    "name": "organisation name",
    "telephone_number": "447700900000",
    "url": "http://www.example.org"
  },
  "name": "Some service name",
  "sector": "local government",
  "service_features": {
    "test_feature": {
      "enabled": true
    },
    "test_feature_2": {
      "enabled": false
    }
  },
  "service_name": {
    "cy": "Service name in welsh",
    "en": "Some service name"
  },
  "went_live_date": "2022-04-09T18:07:46.568Z"
}