Password reset table on tenant database

It's possible to force the password reset entries to be saved on the tenant connection. In order to do so update the `auth.php` file and add the `connection` key like this:

```php
    'passwords' => [
        'users' => [
            'provider' => 'users',
            'table' => 'password_resets',
            'expire' => 60,
            'connection' => 'tenant',
        ],
    ],
```