curl --request POST \
  --url https://api.debbiecollect.com/v1/{tenantId}/customers/{customerId}/users \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "lang": "da",
  "contact": true,
  "relation": "alternative-contact",
  "details": {
    "name": "Hans Hansen",
    "email": "example@debbie.dk",
    "description": "Driver of the vehicle",
    "phone": {
      "locale": "45",
      "number": "12345678"
    },
    "address": {
      "address": "Applebys Plads 7, 1.",
      "city": "København K",
      "zipcode": "1411"
    }
  }
}
'

import requests

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

payload = {
    "lang": "da",
    "contact": True,
    "relation": "alternative-contact",
    "details": {
        "name": "Hans Hansen",
        "email": "example@debbie.dk",
        "description": "Driver of the vehicle",
        "phone": {
            "locale": "45",
            "number": "12345678"
        },
        "address": {
            "address": "Applebys Plads 7, 1.",
            "city": "København K",
            "zipcode": "1411"
        }
    }
}
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({
    lang: 'da',
    contact: true,
    relation: 'alternative-contact',
    details: {
      name: 'Hans Hansen',
      email: 'example@debbie.dk',
      description: 'Driver of the vehicle',
      phone: {locale: '45', number: '12345678'},
      address: {address: 'Applebys Plads 7, 1.', city: 'København K', zipcode: '1411'}
    }
  })
};

fetch('https://api.debbiecollect.com/v1/{tenantId}/customers/{customerId}/users', 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/{customerId}/users",
  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([
    'lang' => 'da',
    'contact' => true,
    'relation' => 'alternative-contact',
    'details' => [
        'name' => 'Hans Hansen',
        'email' => 'example@debbie.dk',
        'description' => 'Driver of the vehicle',
        'phone' => [
                'locale' => '45',
                'number' => '12345678'
        ],
        'address' => [
                'address' => 'Applebys Plads 7, 1.',
                'city' => 'København K',
                'zipcode' => '1411'
        ]
    ]
  ]),
  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/{customerId}/users"

	payload := strings.NewReader("{\n  \"lang\": \"da\",\n  \"contact\": true,\n  \"relation\": \"alternative-contact\",\n  \"details\": {\n    \"name\": \"Hans Hansen\",\n    \"email\": \"example@debbie.dk\",\n    \"description\": \"Driver of the vehicle\",\n    \"phone\": {\n      \"locale\": \"45\",\n      \"number\": \"12345678\"\n    },\n    \"address\": {\n      \"address\": \"Applebys Plads 7, 1.\",\n      \"city\": \"København K\",\n      \"zipcode\": \"1411\"\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/{customerId}/users")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"lang\": \"da\",\n  \"contact\": true,\n  \"relation\": \"alternative-contact\",\n  \"details\": {\n    \"name\": \"Hans Hansen\",\n    \"email\": \"example@debbie.dk\",\n    \"description\": \"Driver of the vehicle\",\n    \"phone\": {\n      \"locale\": \"45\",\n      \"number\": \"12345678\"\n    },\n    \"address\": {\n      \"address\": \"Applebys Plads 7, 1.\",\n      \"city\": \"København K\",\n      \"zipcode\": \"1411\"\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

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

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  \"lang\": \"da\",\n  \"contact\": true,\n  \"relation\": \"alternative-contact\",\n  \"details\": {\n    \"name\": \"Hans Hansen\",\n    \"email\": \"example@debbie.dk\",\n    \"description\": \"Driver of the vehicle\",\n    \"phone\": {\n      \"locale\": \"45\",\n      \"number\": \"12345678\"\n    },\n    \"address\": {\n      \"address\": \"Applebys Plads 7, 1.\",\n      \"city\": \"København K\",\n      \"zipcode\": \"1411\"\n    }\n  }\n}"

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

{
  "userOnCustomerId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "id": 123,
  "customerId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "userId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}