Feature request: Option to update the window dynamically.

[robincsamuel]

Hi,

I have a use case where the user can choose between an authenticator app or a receiving the OTP through SMS.

I can get the current OTP via the getCurrentOtp method and text it. However, since it takes a while to deliver the OTP via SMS, I need to set the window to 4 or so. But I still want to keep the window 1 for authenticator app-based requests.

I think it'd be easy to manage if the PragmaRX\Google2FALaravel\Google2FA uses $this->getWindow() instead of $this->config('window').

I can then use middleware like the one below to update the window.

public function handle($request, Closure $next)
{
    $authenticator = app(Authenticator::class)->boot($request);

    if(Auth::user()->mfa_preference === Constants::SMS){
      $authenticator->setWindow(4);
    }
    
    if ($authenticator->isAuthenticated()) {
        return $next($request);
    }

    return $authenticator->makeRequestOneTimePasswordResponse();
}

Please let me know your thoughts, I'd be happy to raise a PR.

Thanks :)