1. Go to this page and download the library: Download vluzrmos/validation-trait library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
class User extends Eloquent{
use ValidationTrait;
$rules = [
"username" => "Nome de usuário obrigatório",
"username.unique" => "Já existe usuário cadastrado com esse nome de usuário"
];
}