curl --request PUT \
  --url https://{domain}/api/v2/network/aff-billing/preferences/{affiliate_id} \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "invoice_type": 1,
  "invoice_frequency": 1,
  "generate_invoice_automatically": 0,
  "payment_terms": 1,
  "vat": 1
}
'

import requests

url = "https://{domain}/api/v2/network/aff-billing/preferences/{affiliate_id}"

payload = {
    "invoice_type": 1,
    "invoice_frequency": 1,
    "generate_invoice_automatically": 0,
    "payment_terms": 1,
    "vat": 1
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    invoice_type: 1,
    invoice_frequency: 1,
    generate_invoice_automatically: 0,
    payment_terms: 1,
    vat: 1
  })
};

fetch('https://{domain}/api/v2/network/aff-billing/preferences/{affiliate_id}', 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://{domain}/api/v2/network/aff-billing/preferences/{affiliate_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'invoice_type' => 1,
    'invoice_frequency' => 1,
    'generate_invoice_automatically' => 0,
    'payment_terms' => 1,
    'vat' => 1
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($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://{domain}/api/v2/network/aff-billing/preferences/{affiliate_id}"

	payload := strings.NewReader("{\n  \"invoice_type\": 1,\n  \"invoice_frequency\": 1,\n  \"generate_invoice_automatically\": 0,\n  \"payment_terms\": 1,\n  \"vat\": 1\n}")

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

	req.Header.Add("X-API-Key", "<api-key>")
	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.put("https://{domain}/api/v2/network/aff-billing/preferences/{affiliate_id}")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"invoice_type\": 1,\n  \"invoice_frequency\": 1,\n  \"generate_invoice_automatically\": 0,\n  \"payment_terms\": 1,\n  \"vat\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{domain}/api/v2/network/aff-billing/preferences/{affiliate_id}")

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

request = Net::HTTP::Put.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"invoice_type\": 1,\n  \"invoice_frequency\": 1,\n  \"generate_invoice_automatically\": 0,\n  \"payment_terms\": 1,\n  \"vat\": 1\n}"

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

{
  "status": "success",
  "code": 200,
  "name": "OK",
  "message": "<string>"
}

{
  "message": "Request could not be parsed.",
  "success": false,
  "info": {
    "errors": {}
  }
}

{
  "message": "API key is invalid or missing.",
  "success": false
}

{
  "message": "This endpoint is not available for your role.",
  "success": false
}

{
  "message": "Resource not found.",
  "success": false
}

{
  "message": "Validation error",
  "success": false,
  "info": {
    "errors": {
      "email": [
        "Email cannot be blank."
      ],
      "currency": [
        "Currency must be a valid ISO code."
      ]
    }
  }
}

{
  "message": "An unexpected error occurred.",
  "success": false,
  "info": {
    "errors": {}
  }
}