Net 6 Using Model Binder to populate user parameter from context - c#-4.0

Question

I got a middleware in my application that reads a JWT token and adds to HttpContext.Items["User"] that user model.
I can read this during my request by reading it from the HttpContext.
What I was trying to do Is a model binder that automatically does that for me so the code looks cleaner.
Right now I have it working like the following:
[HttpPost]
[JwtAuthorize]
[Route("readerfrombinder")]
public async Task<IActionResult> ComesFromContext()
{
var user = Request.HttpContext.Items["User"] as TokenUser;
return Ok("You Have Access with binded user "+user.Id);
}
But what im trying to achieve is something like
[HttpPost]
[JwtAuthorize]
[Route("readerfrombinder")]
public async Task<IActionResult> ComesFromBind([ModelBinder] TokenUser comesFromBind)
{
return Ok("You Have Access with binded user "+comesFromBind.Id);
}
I wrote a binder to try this out:
using Microsoft.AspNetCore.Mvc.ModelBinding;
namespace Login.Jwt;
public class UserBinder : IModelBinder
{
private readonly TokenUser _context;
public UserBinder(TokenUser context)
{
_context = context;
}
public Task BindModelAsync(ModelBindingContext bindingContext)
{
if (bindingContext == null)
{
throw new ArgumentNullException(nameof(bindingContext));
}
var model = bindingContext.HttpContext.Items["User"] as TokenUser;
bindingContext.Result = ModelBindingResult.Success(model);
return Task.CompletedTask;
}
}
And added this binder to my user object:
[ModelBinder(BinderType = typeof(UserBinder))]
public class TokenUser
{
public string Id { get; set; }
public string SessionTicket { get; set; }
}
But apparently I'm missing something.
Would appreciate any help ! Thanks !