App\User not found when I try to register or login

I'm trying to login or register a user but I always get Class '\App\User' not found even though last time it was working properly..

User.php

     <?php

  namespace App;
  use Illuminate\Notifications\Notifiable;
  use Illuminate\Foundation\Auth\User as Authenticatable;
    class User extends Authenticatable
  {
    use Notifiable;

  protected $fillable = [
    'username', 'email', 'password','tel','ville',
       ];

  protected $hidden = [
    'password', 'remember_token',
     ];
         }

My routes Auth.php

'providers' => [
    'users' => [
        'driver' => 'eloquent',
        'model' => App\User::class,
    ],
    'admins' => [
        'driver' => 'eloquent',
        'model' => App\Admin::class,
    ],

Login.blade

  <form action="/login" method="post">
             

            <div class="input-field col s12">
      <i class="material-icons prefix">email
                                              </i>
      <input id="icon_prefix" name="email" type="text" class="validate">
      <label for="icon_prefix" style="color:#fff;">E-Mail</label>
    </div>
    <div class="input-field col s12">
    <i class="material-icons prefix">lock</i>
      <input id="icon_prefix" name="password" type="text" class="validate">
      <label for="icon_prefix" style="color:#fff;">Mot de passe</label>
    </div>

via Chebli Mohamed