It is possible to [bind actions' parameters](https://learn.microsoft.com/en-us/aspnet/core/web-api#binding-source-parameter-inference) via:

* `[FromBody]` Request body
* `[FromForm]` Form data in the request body
* `[FromHeader]` Request header
* `[FromQuery]` Request query string parameter
* `[FromRoute]` Route data from the current request
* `[FromServices]`

I often need to extract something from a JWT, almost always the `id` (primary key). So I do this (ignore error checking for now):

```
var id = int.Parse(base.User.FindFirst(ClaimTypes.NameIdentifier)?.Value);

```

It would be great if I could put that into an attribute binder that would work like this:

```
public IActionResult doStuff([FromBody] MyModel model, [FromJwt] int id) {
  // id works automatically
}

```

Or maybe `[FromJwtId]` instead to make it simpler.

Is such a thing possible?