curl --request GET \
  --url https://accounts.livechat.com/v2/roles \
  --header 'Authorization: Basic <encoded-value>'

import requests

url = "https://accounts.livechat.com/v2/roles"

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://accounts.livechat.com/v2/roles', 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://accounts.livechat.com/v2/roles",
  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://accounts.livechat.com/v2/roles"

	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://accounts.livechat.com/v2/roles")
  .header("Authorization", "Basic <encoded-value>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://accounts.livechat.com/v2/roles")

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

[
  {
    "role_id": "728b99be-848c-11ea-9b91-005056a007e9",
    "product": "LiveChat",
    "role": "administrator",
    "type": "primary",
    "predefined": true
  }
]

{
  "error": "unauthorized",
  "error_description": "The account is not authorized.",
  "request_id": "5903c51b-89f0-41a9-a25d-4f39af100353"
}

{
  "error": "access_denied",
  "sub_error": "insufficient_scope",
  "error_description": "The resource owner or authorization server denied the request.",
  "request_id": "5903c51b-89f0-41a9-a25d-4f39af100353"
}

{
  "error": "server_error",
  "error_description": "The server encountered an unexpected condition that prevented it from fulfilling the request.",
  "request_id": "5903c51b-89f0-41a9-a25d-4f39af100353"
}