curl --request GET \
  --url https://my.cloudtalk.io/api/campaigns/index.json \
  --header 'Authorization: Basic <encoded-value>'

import requests

url = "https://my.cloudtalk.io/api/campaigns/index.json"

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://my.cloudtalk.io/api/campaigns/index.json', 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://my.cloudtalk.io/api/campaigns/index.json",
  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://my.cloudtalk.io/api/campaigns/index.json"

	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://my.cloudtalk.io/api/campaigns/index.json")
  .header("Authorization", "Basic <encoded-value>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://my.cloudtalk.io/api/campaigns/index.json")

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

{
  "responseData": {
    "itemsCount": 3,
    "pageCount": 1,
    "pageNumber": 1,
    "limit": 3,
    "data": [
      {
        "Campaign": {
          "id": "63",
          "name": "Test Dialer",
          "status": "inactive",
          "has_schedule_date": false,
          "answer_wait_time": "45",
          "after_call_dialing_auto": false,
          "after_call_time": "5",
          "is_recording": false,
          "is_predictive": false,
          "attempts": "1",
          "attempts_interval": "18"
        },
        "Button": [
          {
            "id": "252",
            "title": "Sale",
            "type": "successful_positive",
            "color": "#2980b9",
            "description": "Sold"
          }
        ],
        "ContactsTag": [
          {
            "id": "133",
            "name": "dialer"
          }
        ],
        "Group": [
          {
            "id": "568",
            "internal_name": "Agents"
          }
        ],
        "Agent": [
          {
            "id": "1075",
            "fullname": "Jane Doe"
          }
        ]
      }
    ]
  }
}