Get subscription invoices

curl --request GET \
  --url https://api.smokeball.com/subscriptions/{id}/invoices \
  --header 'Authorization: <api-key>' \
  --header 'x-api-key: <api-key>'

{
  "id": "b471682e-fa17-4e46-b7fe-9b2b8fdcb3c2",
  "href": "<string>",
  "relation": "<string>",
  "method": "GET",
  "self": {
    "id": "<string>",
    "href": "<string>",
    "relation": "<string>",
    "method": "GET"
  },
  "productSuite": "<string>",
  "tier": {
    "id": "b471682e-fa17-4e46-b7fe-9b2b8fdcb3c2",
    "href": "<string>",
    "relation": "<string>",
    "method": "GET",
    "self": {
      "id": "<string>",
      "href": "<string>",
      "relation": "<string>",
      "method": "<string>"
    },
    "smokeballId": "<string>",
    "productSuite": "<string>",
    "name": "Intake",
    "description": "<string>",
    "trialPeriodDays": 123,
    "prices": [
      {
        "default": true,
        "active": true,
        "type": "Recurring",
        "name": "\"$109 per user/month\"",
        "amount": 5900,
        "interval": "Monthly"
      }
    ],
    "createdDate": "2022-04-23T14:00:00Z",
    "updatedDate": "2022-04-23T14:00:00Z"
  },
  "addOns": [
    {
      "id": "b471682e-fa17-4e46-b7fe-9b2b8fdcb3c2",
      "href": "<string>",
      "relation": "<string>",
      "method": "<string>",
      "self": {
        "id": "<string>",
        "href": "<string>",
        "relation": "<string>",
        "method": "<string>"
      },
      "smokeballId": "<string>",
      "productSuite": "<string>",
      "name": "Intake",
      "description": "<string>",
      "trialPeriodDays": 123,
      "prices": [
        {
          "default": true,
          "active": true,
          "type": "Recurring",
          "name": "\"$109 per user/month\"",
          "amount": 5900,
          "interval": "Monthly"
        }
      ],
      "createdDate": "2022-04-23T14:00:00Z",
      "updatedDate": "2022-04-23T14:00:00Z"
    }
  ],
  "discounts": [
    {
      "promotion": {
        "id": "b471682e-fa17-4e46-b7fe-9b2b8fdcb3c2",
        "href": "<string>",
        "relation": "<string>",
        "method": "GET",
        "self": {
          "id": "<string>",
          "href": "<string>",
          "relation": "<string>",
          "method": "<string>"
        },
        "productSuite": "<string>",
        "tiers": [
          {
            "id": "b471682e-fa17-4e46-b7fe-9b2b8fdcb3c2",
            "href": "<string>",
            "relation": "<string>",
            "method": "<string>",
            "self": {
              "id": "<string>",
              "href": "<string>",
              "relation": "<string>",
              "method": "<string>"
            },
            "smokeballId": "<string>",
            "productSuite": "<string>",
            "name": "Intake",
            "description": "<string>",
            "trialPeriodDays": 123,
            "prices": [
              {
                "default": true,
                "active": true,
                "type": "Recurring",
                "name": "\"$109 per user/month\"",
                "amount": 5900,
                "interval": "Monthly"
              }
            ],
            "createdDate": "2022-04-23T14:00:00Z",
            "updatedDate": "2022-04-23T14:00:00Z"
          }
        ],
        "addOns": [
          {
            "id": "b471682e-fa17-4e46-b7fe-9b2b8fdcb3c2",
            "href": "<string>",
            "relation": "<string>",
            "method": "<string>",
            "self": {
              "id": "<string>",
              "href": "<string>",
              "relation": "<string>",
              "method": "<string>"
            },
            "smokeballId": "<string>",
            "productSuite": "<string>",
            "name": "Intake",
            "description": "<string>",
            "trialPeriodDays": 123,
            "prices": [
              {
                "default": true,
                "active": true,
                "type": "Recurring",
                "name": "\"$109 per user/month\"",
                "amount": 5900,
                "interval": "Monthly"
              }
            ],
            "createdDate": "2022-04-23T14:00:00Z",
            "updatedDate": "2022-04-23T14:00:00Z"
          }
        ],
        "usage": [
          "<string>"
        ],
        "name": "Summer Sale 2024",
        "description": "Summer Sale 2024",
        "durationDays": 7,
        "amountOff": 2000,
        "percentOff": 20.5,
        "active": true,
        "numUsed": 42,
        "createdDate": "2024-01-15T10:00:00Z",
        "expirationDate": "2024-12-31T23:59:59Z",
        "codes": [
          {
            "id": "promo_code_1234",
            "name": "SUMMER2024",
            "description": "100% discount!",
            "code": "SUMMER2024",
            "active": true,
            "minimumAmount": 5000,
            "firstTimeCustomersOnly": true,
            "limit": 100,
            "createdDate": "2024-01-15T10:00:00Z",
            "expiratonDate": "2024-12-31T23:59:59Z",
            "metadata": {}
          }
        ],
        "metadata": {},
        "isPersistent": true,
        "isFree": true,
        "deleted": true
      },
      "activationDate": "2023-11-07T05:31:56Z",
      "expirationDate": "2023-11-07T05:31:56Z"
    }
  ],
  "status": "<string>",
  "interval": "<string>",
  "quantity": 3,
  "createdDate": "2022-04-23T14:00:00Z",
  "trialStatus": "<string>",
  "trialPeriodStartDate": "2022-04-23T14:00:00Z",
  "trialPeriodEndDate": "2022-04-23T14:00:00Z",
  "currentPeriodStartDate": "2022-04-23T14:00:00Z",
  "currentPeriodEndDate": "2022-04-23T14:00:00Z",
  "cancellationStatus": "<string>",
  "cancellationType": "PeriodEnd",
  "canceledAt": "2024-12-01T09:00:00Z",
  "cancelAt": "2025-04-23T14:00:00Z"
}