ReflectionException - Middleware class does not exist Laravel 5.2

I am building an API with stateless HTTP basic authentication in Laravel 5.2, as per documentation Stateless HTTP Basic Authentication , I have created following Middleware

app/Http/Middleware/AuthenticateOnceWithBasicAuth.php

<?php

namespace Illuminate\Auth\Middleware;

use Auth;
use Closure;

class AuthenticateOnceWithBasicAuth
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */

    public function handle($request, Closure $next)
    {
        return Auth::onceBasic() ?: $next($request);

    }

}

And then registered it in Kernel.php

app/Http/kernel.php

protected $routeMiddleware = [
    'auth' => \App\Http\Middleware\Authenticate::class,
    'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
    'can' => \Illuminate\Foundation\Http\Middleware\Authorize::class,
    'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
    'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
    'auth.basic.once' => \App\Http\Middleware\AuthenticateOnceWithBasicAuth::class,
];

I am using it in route as follows

Route::group(['prefix' => 'admin', 'middleware' => 'auth.basic.once'], function () {

Route::get('service/create', function ()    {
    return response()->json(['name' => 'Abigail', 'state' => 'CA'], 200);
});

});

But it is giving me

ReflectionException in Container.php line 734: Class App\Http\Middleware\AuthenticateOnceWithBasicAuth does not exist

I have run following commands but with no success

composer dump-autoload
php artisan clear-compiled
php artisan optimize 

Any help would be much appreciated. Thanks in advance.

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