I'm trying to call this method from another one, but I don't how to call it, because it requires the arguments, and I don't know what to send them.
private void doVerify(object sender, DoWorkEventArgs args) {
        VerificationResult verificationResult = new VerificationResult();
        verificationResult.score = _engine.Verify((NffvUser)args.Argument, 20000, out verificationResult.engineStatus);
        args.Result = verificationResult;
}