public MainWindow()
{
InitializeComponent();
DataContext = this;
var timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromMilliseconds(500);
timer.Tick += (s, e) => SecondsToGo = 30 - Convert.ToInt32(DateTimeOffset.UtcNow.ToUnixTimeSeconds() % 30);
timer.IsEnabled = true;
secret = new byte[] { 0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x21, 0xDE, 0xAD, 0xBE, 0xEF };
Secret = Base32.Encode(secret);
Identity = "*****@*****.**";
QRCodeUrl = GetQRCodeUrl();
}