ldc-jeusselin/app/Providers/AuthServiceProvider.php

<?php

namespace App\Providers;

use App\Auth\CrmUserProvider;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;

class AuthServiceProvider extends ServiceProvider
{
    /**
     * Register any authentication / authorization services.
     *
     * @return void
     */
    public function boot()
    {
        $this->app->auth->provider('crm', function ($app, array $config) {
            return new CrmUserProvider($app['hash'], $config['model']);
        });

        $this->registerPolicies();
    }
}