how to retrieve input event with R3 and Stride3d

RetrieveInputKeyEventWithR3.cs

using System;
using Stride.Engine;
using Stride.Input;
using R3;

namespace RetrieveInputKeyEventWithR3;

public class RetriveKeyEventScript: StartupScript
{
    public override Start()
    {
        Observable.Create<KeyEvent>(obs =>
            {
                var listener = new MyKeyInputListener(obs, new WeakReference<InputManager>(Input));
                Input.AddListener(listener);
                return listener;
            })
            .Subscribe(keyEvent => Log.Info($"{keyEvent.Key}, {keyEvent.RepeatCount}"));
    }
    internal sealed class MyKeyInputListener(Observer<KeyEvent> observer, WeakReference<InputManager> inputManager) : IInputEventListener<KeyEvent>, IDisposable
    {
        bool disposed = false;
        public void Dispose()
        {
            if(!disposed)
            {
                disposed = true;
                observer.Dispose();
                if(inputManager.TryGetTarget(out var input))
                {
                    input.RemoveListener(this);
                }
            }
        }

        public void ProcessEvent(KeyEvent inputEvent)
        {
            if(!disposed)
            {
                observer.OnNext(inputEvent);
            }
        }
    }
}