BillingItemType

curl --request GET \
  --url https://eure-instanz.iw-erp.de/api/invoice/billingitemtypes \
  --header 'x-iw-jwt-token: <TOKEN>'

const options = {method: 'GET', headers: {'x-iw-jwt-token': '<TOKEN>'}};

fetch('https://eure-instanz.iw-erp.de/api/invoice/billingitemtypes', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://eure-instanz.iw-erp.de/api/invoice/billingitemtypes"

headers = {"x-iw-jwt-token": "<TOKEN>"}

response = requests.get(url, headers=headers)

print(response.text)

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://eure-instanz.iw-erp.de/api/invoice/billingitemtypes', [
  'headers' => [
    'x-iw-jwt-token' => '<TOKEN>',
  ],
]);

echo $response->getBody();

using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
  Method = HttpMethod.Get,
  RequestUri = new Uri("https://eure-instanz.iw-erp.de/api/invoice/billingitemtypes"),
  Headers =
  {
    { "x-iw-jwt-token", "<TOKEN>" },
  },
};
using (var response = await client.SendAsync(request))
{
  response.EnsureSuccessStatusCode();
  var body = await response.Content.ReadAsStringAsync();
  Console.WriteLine(body);
}

OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder()
  .url("https://eure-instanz.iw-erp.de/api/invoice/billingitemtypes")
  .get()
  .addHeader("x-iw-jwt-token", "<TOKEN>")
  .build();

Response response = client.newCall(request).execute();

package main

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

func main() {

	url := "https://eure-instanz.iw-erp.de/api/invoice/billingitemtypes"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("x-iw-jwt-token", "<TOKEN>")

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

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

	fmt.Println(string(body))

}

Dart mit package:http (kein Controller im Package iw_erp_api)

import 'package:http/http.dart' as http;

final response = await http.get(
  Uri.parse('https://eure-instanz.iw-erp.de/api/invoice/billingitemtypes'),
  headers: {'x-iw-jwt-token': '<TOKEN>'},
);
print(response.body);