Problema com o db:seed

Boa tarde, quando eu tento rodar o comando

php artisan db:seed

aparecem as mensagens

In Container.php line 811:

  Target class [UsuarioSeeder] does not exist.  


In Container.php line 809:

  Class UsuarioSeeder does not exist  

Minha classe UsuarioSeeder está assim:

<?php
namespace Database\Seeders;

use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\Hash;
use App\User;

class UsuarioSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        User::create([
                'email' => 'teste@email', 
                'password' =>Hash::make('senha')

        ]);
    }
}

MInha Classe Database Seeder:

<?php
namespace Database\Seeders;

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $this->call('UsuarioSeeder');
    }
}

Estou usando o Ubuntu 20.04 LTS, e PHP 7.4, podem me ajudar?

Já rodei o composer dumpautoload e nada.