curl --request POST \
  --url https://api.sonderplan.com/v2/user \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "first_name": "Jane",
  "last_name": "Smith",
  "primary_email": "[email protected]",
  "username": "jsmith",
  "group_id": 9223,
  "timezone": "Australia/Sydney",
  "locale": "en_US",
  "date_format": "d/m/Y",
  "time_format": "1",
  "notification": true,
  "expires": 123,
  "schedule_view_mode": 123
}
'

import requests

url = "https://api.sonderplan.com/v2/user"

payload = {
    "first_name": "Jane",
    "last_name": "Smith",
    "primary_email": "[email protected]",
    "username": "jsmith",
    "group_id": 9223,
    "timezone": "Australia/Sydney",
    "locale": "en_US",
    "date_format": "d/m/Y",
    "time_format": "1",
    "notification": True,
    "expires": 123,
    "schedule_view_mode": 123
}
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({
    first_name: 'Jane',
    last_name: 'Smith',
    primary_email: '[email protected]',
    username: 'jsmith',
    group_id: 9223,
    timezone: 'Australia/Sydney',
    locale: 'en_US',
    date_format: 'd/m/Y',
    time_format: '1',
    notification: true,
    expires: 123,
    schedule_view_mode: 123
  })
};

fetch('https://api.sonderplan.com/v2/user', 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.sonderplan.com/v2/user",
  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([
    'first_name' => 'Jane',
    'last_name' => 'Smith',
    'primary_email' => '[email protected]',
    'username' => 'jsmith',
    'group_id' => 9223,
    'timezone' => 'Australia/Sydney',
    'locale' => 'en_US',
    'date_format' => 'd/m/Y',
    'time_format' => '1',
    'notification' => true,
    'expires' => 123,
    'schedule_view_mode' => 123
  ]),
  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.sonderplan.com/v2/user"

	payload := strings.NewReader("{\n  \"first_name\": \"Jane\",\n  \"last_name\": \"Smith\",\n  \"primary_email\": \"[email protected]\",\n  \"username\": \"jsmith\",\n  \"group_id\": 9223,\n  \"timezone\": \"Australia/Sydney\",\n  \"locale\": \"en_US\",\n  \"date_format\": \"d/m/Y\",\n  \"time_format\": \"1\",\n  \"notification\": true,\n  \"expires\": 123,\n  \"schedule_view_mode\": 123\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.sonderplan.com/v2/user")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"first_name\": \"Jane\",\n  \"last_name\": \"Smith\",\n  \"primary_email\": \"[email protected]\",\n  \"username\": \"jsmith\",\n  \"group_id\": 9223,\n  \"timezone\": \"Australia/Sydney\",\n  \"locale\": \"en_US\",\n  \"date_format\": \"d/m/Y\",\n  \"time_format\": \"1\",\n  \"notification\": true,\n  \"expires\": 123,\n  \"schedule_view_mode\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sonderplan.com/v2/user")

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  \"first_name\": \"Jane\",\n  \"last_name\": \"Smith\",\n  \"primary_email\": \"[email protected]\",\n  \"username\": \"jsmith\",\n  \"group_id\": 9223,\n  \"timezone\": \"Australia/Sydney\",\n  \"locale\": \"en_US\",\n  \"date_format\": \"d/m/Y\",\n  \"time_format\": \"1\",\n  \"notification\": true,\n  \"expires\": 123,\n  \"schedule_view_mode\": 123\n}"

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

{
  "success": {
    "id": 2384
  }
}

{
  "error": {
    "code": 400,
    "message": "name is required... Name of the tax"
  }
}