Fetch invoice

curl --request GET \
  --url https://api.useaira.com/v1/invoices/{id} \
  --header 'X-API-KEY: <api-key>'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "displayId": "<string>",
  "customer": {
    "id": "<string>",
    "externalId": "cust_1234567890abcdef",
    "name": "Acme Inc.",
    "customFields": {
      "custom_field_1": "value1",
      "custom_field_2": "value2"
    }
  },
  "paymentAccount": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "businessName": "<string>",
    "tradeName": "<string>",
    "taxId": "<string>",
    "email": "jsmith@example.com",
    "address": {
      "zipCode": "<string>",
      "number": "<string>",
      "street": "<string>",
      "neighborhood": "<string>",
      "city": "<string>",
      "state": "AC",
      "country": "Brasil",
      "complement": "<string>"
    }
  },
  "contract": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "startDate": "2023-12-25",
    "endDate": "2023-12-25",
    "billingEndDay": 16,
    "status": "active",
    "paymentSettings": {
      "scheduledPaymentDay": 16,
      "dueOffsetDays": 6
    },
    "billingSettings": {
      "billingCycleMinimumAmount": 1
    },
    "customFields": {}
  },
  "startDate": "2023-12-25",
  "endDate": "2023-12-25",
  "totalAmount": 1,
  "closedReason": "end_of_cycle",
  "payments": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "amount": 123,
      "dueDate": "2023-12-25",
      "createdAt": "2023-11-07T05:31:56Z",
      "processedAt": "2023-11-07T05:31:56Z",
      "paymentMethod": "bolepix",
      "status": "created",
      "pixLink": "<string>",
      "bankSlipLink": "<string>"
    }
  ],
  "status": "open",
  "plans": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "description": "<string>",
      "productId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "product": {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "name": "<string>"
      },
      "planSettings": {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "fixedAmount": 1,
        "minimumAmount": 1
      },
      "metrics": [
        {
          "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "resourceId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "currencyUnitId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "name": "<string>",
          "billingModel": "in_full",
          "priceTierDivision": "unique_tier",
          "fixedAmount": 1,
          "minimumAmount": 1,
          "resourceName": "<string>",
          "resourceType": "unit",
          "currencyUnit": {
            "id": "<string>",
            "name": "<string>",
            "code": "<string>"
          },
          "priceTiers": [
            {
              "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
              "billingType": "unit",
              "from": 2,
              "to": 2,
              "packageSize": 2,
              "price": "<string>",
              "fixedPrice": "<string>",
              "basisPoints": 1,
              "totalAmount": 1,
              "usage": 1
            }
          ],
          "totalAmount": 1
        }
      ],
      "totalAmount": 1
    }
  ],
  "additionalItems": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "description": "<string>",
      "amount": 2,
      "type": "discount"
    }
  ]
}