eloquent relations with extend user model sentinel laravel package

I have a class User that extends

<?php

namespace App;

class User extends \Cartalyst\Sentinel\Users\EloquentUser
{
    public function chalets(){
        return $this->hasMany('App\Chalet');
    }
}

and i have Chalet Class

class Chalet extends Model
{
    protected $fillable = [
        'name', 'description',
    ];
public function user(){
        return $this->belongsTo('App\User');
    }
}

And i have method to add chalet by user :

public function postCreateChalet(Request $request){
        $chalet = new Chalet([
            'name' => $request->input('name'),
            'description' => $request->input('description')
        ]);
        Sentinel::getUserRepository()->setModel('App\User');
        $user = Sentinel::getUser();
        $user->chalets()->save($chalet);
        return ('chalet has created');
    }

and its give me an error :

BadMethodCallException
Call to undefined method Cartalyst\Sentinel\Users\EloquentUser::chalets()

Is it a right way to extend User class ?

I have searched for ways to extend the User class. I found this question: Model Inheritance in Laravel didn't help me though.

I'm using Laravel 5.7

via Chebli Mohamed