Criei um controller e configurei uma rota no laravel porém ele não reconhece a class do controller

---- Código das rotas
use Illuminate\Support\Facades\Route;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get(''''/'''', function () {
return view(''''principal'''');
});

Route::get(''''/cadastro'''',[''''as''''=>''''cadastro'''',''''uses''''=>''''ProntuarioController@cadastro'''']);

------------------------- Código do Controller

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use Illuminate\Support\Facades\DB;

class ProntuarioController extends Controller
{
public function cadastro(){
return view(''''cadastro'''');
}
}