Getting registration error messages on custom register page Laravel

I've worded my question really bad but I've been looking through Laravel files and docs for hours and have no solutions.

I have a custom php page that has a register form:

customRegister.php:

<?php require_once __DIR__ . '/../../../vanguard/extra/auth.php';\
$foundUsername = "testUser";
?>

<form role="form" action="https://my.neonn.com.au/register" method="POST" id="registration-form" autocomplete="off">
    <input type="hidden" value="<?= csrf_token() ?>" name="_token">
    <input type="hidden" name="username" id="username" value="<?php echo $foundUsername; ?>">
    <input type="password" class="form-control empty" id="inputPassword" name="password">
    <input type="password" class="form-control empty" id="inputPasswordCheck" name="password_confirmation">

    <button type="submit">Submit</button>
</form>

I am attempting to display the "partial/messages" errors that are displayed when the password does not meet the rules. e.g contains 6 characters.

I have tried things like adding this to my code <?= @include('partials/messages') ?>. nothing seems to work.

via Chebli Mohamed