curl --request GET \
  --url https://api.fint.app/api/v1/contact/external-reference/:externalReference \
  --header 'x-api-key: <api-key>'

{
  "id": 123,
  "name": "<string>",
  "lastName": "<string>",
  "createdAt": "<string>",
  "documentType": "DNI",
  "documentNumber": "<string>",
  "address": "<string>",
  "country": "<string>",
  "birthDate": "<string>",
  "age": 123,
  "phoneNumber": "<string>",
  "mobileNumber": "<string>",
  "email": "jsmith@example.com",
  "hasSiblings": true,
  "tags": [
    {
      "id": 123,
      "name": "<string>",
      "color": "<string>",
      "icon": "<string>",
      "group": true,
      "parent": {
        "id": 123,
        "name": "<string>",
        "color": "<string>",
        "icon": "<string>"
      }
    }
  ],
  "active": true,
  "activeStatus": {
    "id": 123,
    "name": "<string>",
    "active": true
  },
  "siblings": [
    {
      "id": 123,
      "name": "<string>",
      "lastName": "<string>",
      "tags": [
        {
          "id": 123,
          "name": "<string>",
          "color": "<string>",
          "icon": "<string>",
          "group": true,
          "parent": {
            "id": 123,
            "name": "<string>",
            "color": "<string>",
            "icon": "<string>"
          }
        }
      ]
    }
  ],
  "familyMembers": [
    {
      "id": 123,
      "type": "<string>",
      "notify": true,
      "name": "<string>",
      "lastName": "<string>",
      "hash": "<string>",
      "documentType": "DNI",
      "documentNumber": "<string>",
      "address": "<string>",
      "city": "<string>",
      "province": "<string>",
      "phoneNumber": "<string>",
      "whatsappNumber": "<string>",
      "email": "<string>",
      "portalUrl": "<string>"
    }
  ],
  "items": [
    {
      "id": 123,
      "name": "<string>",
      "amount": "<string>",
      "description": "<string>",
      "status": "active",
      "type": "credit",
      "frequencyType": "one_time",
      "startDate": "<string>",
      "collectionCycles": 1,
      "generateInterestForLatePayment": false,
      "moraDetails": [
        {
          "fromDay": 123,
          "untilDay": 123,
          "percentage": "<string>",
          "daysToApply": 123,
          "interestCalculated": "<string>",
          "interestType": "FIXED",
          "itemId": 123,
          "configId": 123,
          "baseAmount": "<string>"
        }
      ],
      "useCase": "subscription",
      "isIndefinite": true,
      "condition": "all",
      "amountType": "fixed",
      "conditionItems": [
        {
          "id": 123,
          "name": "<string>",
          "amount": "<string>",
          "description": "<string>",
          "status": "active",
          "type": "credit",
          "frequencyType": "one_time",
          "startDate": "<string>",
          "collectionCycles": 1
        }
      ],
      "originalAmount": "<string>"
    }
  ],
  "invoices": [
    {
      "id": 123,
      "totalAmount": "<string>",
      "totalPaid": "<string>",
      "totalPending": "<string>",
      "totalMora": "<string>",
      "interestPaid": "<string>",
      "interestSnapshot": "<string>",
      "interestSnapshotDate": "<string>",
      "status": "DRAFT",
      "description": "<string>",
      "date": "<string>",
      "expirationDate": "<string>",
      "settlement": {
        "id": 123,
        "name": "<string>",
        "sentDate": "<string>",
        "status": "DRAFT"
      },
      "lastPaymentDate": "<string>",
      "uniqueId": "<string>",
      "applyInterest": true,
      "externalReference": "<string>"
    }
  ],
  "files": [
    {
      "id": 123,
      "createdAt": "<string>",
      "url": "<string>"
    }
  ],
  "notes": [
    {
      "id": 123,
      "createdAt": "<string>",
      "note": "<string>",
      "user": {
        "id": 123,
        "name": "<string>",
        "lastName": "<string>"
      },
      "apiKey": {
        "id": 123,
        "name": "<string>"
      }
    }
  ],
  "teachableCourses": [
    {
      "id": 123,
      "name": "<string>",
      "expiresAt": "<string>",
      "status": "ENROLLED",
      "teachableCourseId": 123
    }
  ],
  "reminderEnable": true,
  "status": "ACCOUNT_OPENED",
  "metadata": {},
  "externalReference": "<string>",
  "hash": "<string>",
  "hasActiveSubscriptions": true
}