curl --request POST \
  --url https://api.debbiecollect.com/v1/{tenantId}/customers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "isCompany": false,
  "referenceId": "123",
  "users": [
    {
      "contact": true,
      "lang": "da",
      "relation": "debtor",
      "details": {
        "name": "Hans Hansen",
        "email": "example@debbie.dk",
        "phone": {
          "locale": "45",
          "number": "12345678"
        },
        "address": {
          "address": "Applebys Plads 7, 1.",
          "coAddress": null,
          "city": "København K",
          "zipcode": "1411"
        },
        "cpr": "1209981919",
        "cvr": null
      }
    }
  ]
}
'

import requests

url = "https://api.debbiecollect.com/v1/{tenantId}/customers"

payload = {
    "isCompany": False,
    "referenceId": "123",
    "users": [
        {
            "contact": True,
            "lang": "da",
            "relation": "debtor",
            "details": {
                "name": "Hans Hansen",
                "email": "example@debbie.dk",
                "phone": {
                    "locale": "45",
                    "number": "12345678"
                },
                "address": {
                    "address": "Applebys Plads 7, 1.",
                    "coAddress": None,
                    "city": "København K",
                    "zipcode": "1411"
                },
                "cpr": "1209981919",
                "cvr": None
            }
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    isCompany: false,
    referenceId: '123',
    users: [
      {
        contact: true,
        lang: 'da',
        relation: 'debtor',
        details: {
          name: 'Hans Hansen',
          email: 'example@debbie.dk',
          phone: {locale: '45', number: '12345678'},
          address: {
            address: 'Applebys Plads 7, 1.',
            coAddress: null,
            city: 'København K',
            zipcode: '1411'
          },
          cpr: '1209981919',
          cvr: null
        }
      }
    ]
  })
};

fetch('https://api.debbiecollect.com/v1/{tenantId}/customers', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.debbiecollect.com/v1/{tenantId}/customers",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'isCompany' => false,
    'referenceId' => '123',
    'users' => [
        [
                'contact' => true,
                'lang' => 'da',
                'relation' => 'debtor',
                'details' => [
                                'name' => 'Hans Hansen',
                                'email' => 'example@debbie.dk',
                                'phone' => [
                                                                'locale' => '45',
                                                                'number' => '12345678'
                                ],
                                'address' => [
                                                                'address' => 'Applebys Plads 7, 1.',
                                                                'coAddress' => null,
                                                                'city' => 'København K',
                                                                'zipcode' => '1411'
                                ],
                                'cpr' => '1209981919',
                                'cvr' => null
                ]
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.debbiecollect.com/v1/{tenantId}/customers"

	payload := strings.NewReader("{\n  \"isCompany\": false,\n  \"referenceId\": \"123\",\n  \"users\": [\n    {\n      \"contact\": true,\n      \"lang\": \"da\",\n      \"relation\": \"debtor\",\n      \"details\": {\n        \"name\": \"Hans Hansen\",\n        \"email\": \"example@debbie.dk\",\n        \"phone\": {\n          \"locale\": \"45\",\n          \"number\": \"12345678\"\n        },\n        \"address\": {\n          \"address\": \"Applebys Plads 7, 1.\",\n          \"coAddress\": null,\n          \"city\": \"København K\",\n          \"zipcode\": \"1411\"\n        },\n        \"cpr\": \"1209981919\",\n        \"cvr\": null\n      }\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.debbiecollect.com/v1/{tenantId}/customers")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"isCompany\": false,\n  \"referenceId\": \"123\",\n  \"users\": [\n    {\n      \"contact\": true,\n      \"lang\": \"da\",\n      \"relation\": \"debtor\",\n      \"details\": {\n        \"name\": \"Hans Hansen\",\n        \"email\": \"example@debbie.dk\",\n        \"phone\": {\n          \"locale\": \"45\",\n          \"number\": \"12345678\"\n        },\n        \"address\": {\n          \"address\": \"Applebys Plads 7, 1.\",\n          \"coAddress\": null,\n          \"city\": \"København K\",\n          \"zipcode\": \"1411\"\n        },\n        \"cpr\": \"1209981919\",\n        \"cvr\": null\n      }\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.debbiecollect.com/v1/{tenantId}/customers")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"isCompany\": false,\n  \"referenceId\": \"123\",\n  \"users\": [\n    {\n      \"contact\": true,\n      \"lang\": \"da\",\n      \"relation\": \"debtor\",\n      \"details\": {\n        \"name\": \"Hans Hansen\",\n        \"email\": \"example@debbie.dk\",\n        \"phone\": {\n          \"locale\": \"45\",\n          \"number\": \"12345678\"\n        },\n        \"address\": {\n          \"address\": \"Applebys Plads 7, 1.\",\n          \"coAddress\": null,\n          \"city\": \"København K\",\n          \"zipcode\": \"1411\"\n        },\n        \"cpr\": \"1209981919\",\n        \"cvr\": null\n      }\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "customerId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}