curl --request GET \
  --url https://panel.sendcloud.sc/api/v2/user/invoices/{id} \
  --header 'Authorization: Basic <encoded-value>'

import requests

url = "https://panel.sendcloud.sc/api/v2/user/invoices/{id}"

headers = {"Authorization": "Basic <encoded-value>"}

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

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Basic <encoded-value>'}};

fetch('https://panel.sendcloud.sc/api/v2/user/invoices/{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://panel.sendcloud.sc/api/v2/user/invoices/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://panel.sendcloud.sc/api/v2/user/invoices/{id}"

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

	req.Header.Add("Authorization", "Basic <encoded-value>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://panel.sendcloud.sc/api/v2/user/invoices/{id}")
  .header("Authorization", "Basic <encoded-value>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://panel.sendcloud.sc/api/v2/user/invoices/{id}")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Basic <encoded-value>'

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

{
  "invoice": {
    "id": 1,
    "ref": "EU-CENTRAL-0-1-22-NL0000001",
    "type": "periodic",
    "price_incl": 0,
    "price_excl": 0,
    "isPayed": true,
    "date": "05-10-2020 02:12:01",
    "items": [
      {
        "id": 33493679,
        "name": "PostNL Standard 0-23kg"
      },
      {
        "id": 33493681,
        "name": "Insurance"
      },
      {
        "id": 33495701,
        "name": "Credit requested for label"
      },
      {
        "id": 33495702,
        "name": "Insurance refund"
      }
    ]
  }
}

{
  "error": {
    "code": 404,
    "request": "api/v2/user/invoices/12312312312",
    "message": "No Invoice matches the given query."
  }
}