Session Method Parameter Decorator

Is the `@Session` decorator avaible?
I attach to `req.session` an user object after sucessfull authentication and use it in controler method to check if user is an owner of demanded object from database.
It would be nice to have :

```
@Get("/posts")
getAll(@Session("user") user: User) {
   return postsRepository.getAllByUser(user);
}
```

And don't have to parse request object by myself :wink:  
