laravel factory not found in C:\xampp\htdocs\laravel_order4u\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Factories\Factory.php code example

Example: Error: Class 'Database\Factories\UserFactory' not found

"autoload": {
    "psr-4": {
        "App\\": "app/",
        "Database\\Factories\\": "database/factories/",
        "Database\\Seeders\\": "database/seeders/"
    }
},