curl -X GET \
 /customers \
 --header "Authorization: Bearer <token>"

{
  "data": [
    {
      "countryCode": "DE",
      "id": "00000000-0000-0000-0000-000000000000",
      "customerNumber": "CUSTOMER-000",
      "timeZone": "Europe/Berlin",
      "firstName": "John",
      "lastName": "Doe",
      "currencyCode": "EUR",
      "companyName": "Acme Inc.",
      "vatId": "DE123456789",
      "isVatIdValid": true,
      "datevId": "123456789",
      "commercialRegisterName": "Amtsgericht Berlin (Charlottenburg)",
      "commercialRegisterNumber": "HRB 123456",
      "status": "STATUS_ACTIVE",
      "gender": "male",
      "phone": "+49 123 456789",
      "language": "de",
      "totalTurnOverRank": 10,
      "createdAt": "2020-01-01T00:00:00+00:00",
      "customFields": {
        "field1": "value1",
        "field2": "value2"
      },
      "businessCustomer": true,
      "defaultAddress": {
        "id": "<string>",
        "vatId": "DE123456789",
        "type": "TYPE_DEFAULT",
        "default": "true",
        "status": "active",
        "city": "Berlin",
        "zip": "12345",
        "street": "Musterstraße",
        "houseNumber": "1a",
        "countryCode": "DE",
        "companyName": "ACME Inc.",
        "salutation": "Herr",
        "addition": "c/o John Doe",
        "costCentre": "123456789",
        "firstName": "John",
        "lastName": "Doe"
      },
      "defaultInvoiceAddress": {
        "id": "<string>",
        "vatId": "DE123456789",
        "type": "TYPE_DEFAULT",
        "default": "true",
        "status": "active",
        "city": "Berlin",
        "zip": "12345",
        "street": "Musterstraße",
        "houseNumber": "1a",
        "countryCode": "DE",
        "companyName": "ACME Inc.",
        "salutation": "Herr",
        "addition": "c/o John Doe",
        "costCentre": "123456789",
        "firstName": "John",
        "lastName": "Doe"
      },
      "defaultEmailAddress": {
        "email": "john.doe@example.com",
        "receiverName": "John Doe",
        "type": "TYPE_COMPANY",
        "id": "00000000-0000-0000-0000-000000000000",
        "default": "true"
      },
      "defaultInvoiceEmailAddress": {
        "email": "john.doe@example.com",
        "receiverName": "John Doe",
        "type": "TYPE_COMPANY",
        "id": "00000000-0000-0000-0000-000000000000",
        "default": "true"
      },
      "defaultPaymentMethod": {},
      "isPartner": true,
      "parentCustomer": {
        "id": "00000000-0000-0000-0000-000000000000",
        "name": "Klinik Musterstadt"
      },
      "childrenCount": 3,
      "isParent": true,
      "isChild": true
    }
  ],
  "meta": {
    "pagination": {
      "totalItems": 123,
      "itemsPerPage": 123,
      "currentPage": 123,
      "lastPage": 123,
      "pageTotalItems": 123
    }
  }
}