How to use count in Eloquent relationship

Laravel Eloquent model has a way for you to return the total number of rows of a related model.

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use App\Models\Product;

class User extends Authenticatable
{
    .....

    public function products() {

        return $this->hasMany(Product::class);

    }

}

Now you can use it like this.

$users = User::withCount('products_count')->get();

foreach ($users as $user) {
    echo $user->products_count;
}