How register multidevices?

[fysout]

Hello,
I'm trying to use the .newConnection(phonenumber) method to connect more than one number, but when I execute the unregistered method the library does not create the image containing the Qrcode...

How should I proceed?

Below is the code I am using:

LocalDateTime agora = LocalDateTime.now();
ConnectionBuilder conexao = Whatsapp.webBuilder();
WebOptionsBuilder builder = conexao.newConnection(5548999999999L);//omitting real number
builder.name("Name API");
Whatsapp whats = builder.unregistered(QrHandler.toFile(Path.of("E:\.Temporários\QrCode\" +
agora.toString().replace(":", "").replace(".", "") + ".jpeg"), ToFileConsumer.toTerminal()));
whats.addLoggedInListener(api -> System.out.printf("Connected: %s%n", api.store().privacySettings()));
whats.addDisconnectedListener(reason -> System.out.printf("Disconnected: %s%n", reason));
whats.addNewChatMessageListener(message -> System.out.printf("New message: %s%n", message.toJson()));
whats = whats.connect().join();