curl --request POST \
  --url https://api-eu.flexportal.io/v1/billing-groups \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Tenant-ID: <tenant-id>' \
  --data '
{
  "customerId": "cust_abc123",
  "groupName": "Acme Corp - IT Department",
  "billingDay": 15,
  "rentalIds": [
    "rental_001",
    "rental_002",
    "rental_003"
  ],
  "notes": "Net 30 payment terms agreed"
}
'

import requests

url = "https://api-eu.flexportal.io/v1/billing-groups"

payload = {
    "customerId": "cust_abc123",
    "groupName": "Acme Corp - IT Department",
    "billingDay": 15,
    "rentalIds": ["rental_001", "rental_002", "rental_003"],
    "notes": "Net 30 payment terms agreed"
}
headers = {
    "Tenant-ID": "<tenant-id>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'Tenant-ID': '<tenant-id>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    customerId: 'cust_abc123',
    groupName: 'Acme Corp - IT Department',
    billingDay: 15,
    rentalIds: ['rental_001', 'rental_002', 'rental_003'],
    notes: 'Net 30 payment terms agreed'
  })
};

fetch('https://api-eu.flexportal.io/v1/billing-groups', 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-eu.flexportal.io/v1/billing-groups",
  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([
    'customerId' => 'cust_abc123',
    'groupName' => 'Acme Corp - IT Department',
    'billingDay' => 15,
    'rentalIds' => [
        'rental_001',
        'rental_002',
        'rental_003'
    ],
    'notes' => 'Net 30 payment terms agreed'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "Tenant-ID: <tenant-id>"
  ],
]);

$response = curl_exec($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-eu.flexportal.io/v1/billing-groups"

	payload := strings.NewReader("{\n  \"customerId\": \"cust_abc123\",\n  \"groupName\": \"Acme Corp - IT Department\",\n  \"billingDay\": 15,\n  \"rentalIds\": [\n    \"rental_001\",\n    \"rental_002\",\n    \"rental_003\"\n  ],\n  \"notes\": \"Net 30 payment terms agreed\"\n}")

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

	req.Header.Add("Tenant-ID", "<tenant-id>")
	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-eu.flexportal.io/v1/billing-groups")
  .header("Tenant-ID", "<tenant-id>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"customerId\": \"cust_abc123\",\n  \"groupName\": \"Acme Corp - IT Department\",\n  \"billingDay\": 15,\n  \"rentalIds\": [\n    \"rental_001\",\n    \"rental_002\",\n    \"rental_003\"\n  ],\n  \"notes\": \"Net 30 payment terms agreed\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-eu.flexportal.io/v1/billing-groups")

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

request = Net::HTTP::Post.new(url)
request["Tenant-ID"] = '<tenant-id>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"customerId\": \"cust_abc123\",\n  \"groupName\": \"Acme Corp - IT Department\",\n  \"billingDay\": 15,\n  \"rentalIds\": [\n    \"rental_001\",\n    \"rental_002\",\n    \"rental_003\"\n  ],\n  \"notes\": \"Net 30 payment terms agreed\"\n}"

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

{
  "success": true,
  "message": "<string>",
  "billingGroup": {
    "billingGroupId": "<string>",
    "tenantId": "<string>",
    "customerId": "<string>",
    "groupName": "<string>",
    "billingDay": 14,
    "totalMonthlyAmount": 1,
    "currency": "<string>",
    "status": "active",
    "createdBy": "<string>",
    "createdAt": "<string>",
    "updatedAt": "<string>",
    "rentalIds": [],
    "activeRentalCount": 0,
    "notes": "<string>"
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>"
  }
}