public function handle($request, Closure $next)
    {
        if (Auth::guest() || Auth::user()->roleUser != 'admin') {
            if($request->ajax() || $request->wantsJson()){
                return response()->json(['success' => false, 'error' => 'Forbidden'], 403);}
            abort(403);
        }
        return $next($request);
    }

protected $routeMiddleware = [
        'auth' => IlluminateAuthMiddlewareAuthenticate::class,
        ....
        'admin' => AppHttpMiddlewareAdmin::class
    ];