curl --request GET \
  --url https://{apiBaseUrl}/v2/{sessionId}/configuration/theme

const url = 'https://{apiBaseUrl}/v2/{sessionId}/configuration/theme';
const options = {method: 'GET'};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

import requests

url = "https://{apiBaseUrl}/v2/{sessionId}/configuration/theme"

response = requests.get(url)

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://{apiBaseUrl}/v2/{sessionId}/configuration/theme",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

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

curl_close($curl);

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

using RestSharp;


var options = new RestClientOptions("https://{apiBaseUrl}/v2/{sessionId}/configuration/theme");
var client = new RestClient(options);
var request = new RestRequest("");
var response = await client.GetAsync(request);

Console.WriteLine("{0}", response.Content);

HttpResponse<String> response = Unirest.get("https://{apiBaseUrl}/v2/{sessionId}/configuration/theme")
  .asString();

{
  "favicon": {
    "url": "https://example.com/favicon.ico"
  },
  "background": {},
  "text": {},
  "title": {},
  "link": {},
  "button": {},
  "enableColorConsistency": true,
  "layout": {}
}

{
  "code": "InvalidSessionId"
}

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