Laravel Class 'Gate' not found - laravel-5

Question

I have follow the upgrade guide but I can't manage to make the Authorization work.
AuthServiceProvider
<?php
namespace App\Providers;
use Illuminate\Contracts\Auth\Access\Gate as GateContract;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
class AuthServiceProvider extends ServiceProvider
{
/**
* The policy mappings for the application.
*
* #var array
*/
/*protected $policies = [
'App\Model' => 'App\Policies\ModelPolicy',
];*/
protected $policies = [
Request::class => AnalysisPolicy::class,
];
/**
* Register any application authentication / authorization services.
*
* #param \Illuminate\Contracts\Auth\Access\Gate $gate
* #return void
*/
public function boot(GateContract $gate)
{
$this->registerPolicies($gate);
//
}
}
Analysis policy
<?php
namespace App\Policies;
use Illuminate\Auth\Access\HandlesAuthorization;
use App\User;
use App\Request;
class AnalysisPolicy
{
use HandlesAuthorization;
/**
* Create a new policy instance.
*
* #return void
*/
public function __construct()
{
//
}
public function view(Request $analysis){
return true;
}
//
}
Controller
<?php
namespace App\Http\Controllers;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Routing\Controller as BaseController;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
abstract class Controller extends BaseController
{
use AuthorizesRequests, DispatchesJobs, ValidatesRequests;
}
TestController
public function showTest()
{
$analysis= Request::find(1);
return view('test', ['analysis' => $analysis]);
}
Test.blade.php
Test page
#can('view', $analysis)
Hello world
#endcan
config\app
'providers' => [
/*
* Laravel Framework Service Providers...
*/
Illuminate\Foundation\Providers\ArtisanServiceProvider::class,
Illuminate\Auth\AuthServiceProvider::class,
Illuminate\Broadcasting\BroadcastServiceProvider::class,
Illuminate\Bus\BusServiceProvider::class,
Illuminate\Cache\CacheServiceProvider::class,
Illuminate\Foundation\Providers\ConsoleSupportServiceProvider::class,
Illuminate\Routing\ControllerServiceProvider::class,
Illuminate\Cookie\CookieServiceProvider::class,
Illuminate\Database\DatabaseServiceProvider::class,
Illuminate\Encryption\EncryptionServiceProvider::class,
Illuminate\Filesystem\FilesystemServiceProvider::class,
Illuminate\Foundation\Providers\FoundationServiceProvider::class,
Illuminate\Hashing\HashServiceProvider::class,
Illuminate\Mail\MailServiceProvider::class,
Illuminate\Pagination\PaginationServiceProvider::class,
Illuminate\Pipeline\PipelineServiceProvider::class,
Illuminate\Queue\QueueServiceProvider::class,
Illuminate\Redis\RedisServiceProvider::class,
Illuminate\Auth\Passwords\PasswordResetServiceProvider::class,
Illuminate\Session\SessionServiceProvider::class,
Illuminate\Translation\TranslationServiceProvider::class,
Illuminate\Validation\ValidationServiceProvider::class,
Illuminate\View\ViewServiceProvider::class,
Illuminate\Html\HtmlServiceProvider::class,
/*
* Application Service Providers...
*/
App\Providers\AppServiceProvider::class,
App\Providers\AuthServiceProvider::class,
App\Providers\EventServiceProvider::class,
App\Providers\RouteServiceProvider::class,
],
'aliases' => [
'App' => Illuminate\Support\Facades\App::class,
'Artisan' => Illuminate\Support\Facades\Artisan::class,
'Auth' => Illuminate\Support\Facades\Auth::class,
'Blade' => Illuminate\Support\Facades\Blade::class,
'Bus' => Illuminate\Support\Facades\Bus::class,
'Cache' => Illuminate\Support\Facades\Cache::class,
'Config' => Illuminate\Support\Facades\Config::class,
'Cookie' => Illuminate\Support\Facades\Cookie::class,
'Crypt' => Illuminate\Support\Facades\Crypt::class,
'DB' => Illuminate\Support\Facades\DB::class,
'Eloquent' => Illuminate\Database\Eloquent\Model::class,
'Event' => Illuminate\Support\Facades\Event::class,
'File' => Illuminate\Support\Facades\File::class,
'Gate' => Illuminate\Support\Facades\Gate::class,
'Hash' => Illuminate\Support\Facades\Hash::class,
'Input' => Illuminate\Support\Facades\Input::class,
'Inspiring' => Illuminate\Foundation\Inspiring::class,
'Lang' => Illuminate\Support\Facades\Lang::class,
'Log' => Illuminate\Support\Facades\Log::class,
'Mail' => Illuminate\Support\Facades\Mail::class,
'Password' => Illuminate\Support\Facades\Password::class,
'Queue' => Illuminate\Support\Facades\Queue::class,
'Redirect' => Illuminate\Support\Facades\Redirect::class,
'Redis' => Illuminate\Support\Facades\Redis::class,
'Request' => Illuminate\Support\Facades\Request::class,
'Response' => Illuminate\Support\Facades\Response::class,
'Route' => Illuminate\Support\Facades\Route::class,
'Schema' => Illuminate\Support\Facades\Schema::class,
'Session' => Illuminate\Support\Facades\Session::class,
'Storage' => Illuminate\Support\Facades\Storage::class,
'URL' => Illuminate\Support\Facades\URL::class,
'Validator' => Illuminate\Support\Facades\Validator::class,
'View' => Illuminate\Support\Facades\View::class,
I always get Class 'Gate' not found. I have laravel 5.1.23. I have tried to run composer update and artisan clear-compiled but nothing worked.

Answer 1

Here is my solution:
in
\vendor\laravel\framework\src\illuminate\Auth\AuthServiceProvider.php
update the provider
https://github.com/laravel/framework/blob/5.1/src/Illuminate/Auth/AuthServiceProvider.php