public function getAccountInformation() {
    $url = $this->url . self::$API_ROUTES['ACCOUNT_INFO'];
    $url .= '?apiVersion=' . $this->apiVersion;

    $result = $this->doGet($url, array(), false);

    if ($result !== null && is_object($result)) {
      $accountInfo = AccountInformation::getFromJson($result);

      if ($accountInfo != null) {
        return $accountInfo;
      }
    }

    return null;
  }