private void LogUserIn()
{
var authenticationCallback = new AuthenticationCallback(this, _userId);
Toast.MakeText(this, "Place fingerprint on sensor", ToastLength.Long).Show();
_fingerprintManager.Authenticate(null, 0, _cancellationSignal, authenticationCallback, null);
}
private void LogUserIn()
{
_cancelation = new global::Android.Support.V4.OS.CancellationSignal();
FingerprintManagerCompat.AuthenticationCallback authenticationCallback = new AuthenticationCallback(this, _userId);
Toast.MakeText(this, "Place fingerprint on sensor", ToastLength.Long).Show();
_fingerprintManagerCompat.Authenticate(null, 0, _cancelation, authenticationCallback, null);
}