private function initClient() {
		if(isset($_COOKIE[self::CLIENT_INFO_COOKIE])) {
			$clientData = @json_decode(base64_decode($_COOKIE[self::CLIENT_INFO_COOKIE], true), true);
			if(!$clientData) {
				throw new \Exception('Wrong format of response cookie data: ' . $_COOKIE[self::CLIENT_INFO_COOKIE]);
			}

			$client = new Client($clientData);
			if(isset($clientData['auth'])) {
				$client->auth = new ClientAuth($clientData['auth']);
			}
			return $client;
		}
	}