curl --request GET \
  --url https://api.maesn.dev/accounting/customers \
  --header 'X-ACCOUNT-KEY: <x-account-key>' \
  --header 'X-API-KEY: <x-api-key>'

{
  "meta": {
    "warnings": [
      "Field not used by target system"
    ],
    "pagination": {
      "total": 123,
      "perPage": 123,
      "currentPage": 123,
      "totalPages": 123
    }
  },
  "data": [
    {
      "id": "92c4f3a2-5b8e-4d1b-8a0c-9f6e7d2f3e4b",
      "addresses": [
        {
          "addressLine1": "Lucky street 1",
          "addressLine2": "2nd floor",
          "city": "Berlin",
          "countryCode": "DE",
          "postalCode": "10243",
          "type": "BILLING"
        }
      ],
      "companyName": "maesn",
      "contactType": "CONTACT_PERSON",
      "contactPersons": [
        {
          "emailAddresses": [
            {
              "email": "john.doe@company.com",
              "type": "BUSINESS"
            }
          ],
          "firstName": "John",
          "lastName": "Doe",
          "phoneNumbers": [
            {
              "number": "+49 7163307056",
              "type": "MOBILE"
            }
          ],
          "salutation": "Mr"
        }
      ],
      "documentId": "Z1248601M",
      "emailAddresses": [
        {
          "email": "john.doe@company.com",
          "type": "BUSINESS"
        }
      ],
      "number": "1042",
      "phoneNumbers": [
        {
          "number": "+49 7163307056",
          "type": "MOBILE"
        }
      ],
      "projectId": "3",
      "updatedDate": "2018-01-01T13:00:00.000Z",
      "vatId": "DE123456789"
    }
  ]
}