megahunt.test/app/Rules/ZxcvbnRule.php

<?php

namespace App\Rules;

use Closure;
use Illuminate\Contracts\Validation\ValidationRule;
use ZxcvbnPhp\Zxcvbn;

class ZxcvbnRule implements ValidationRule
{
    /**
     * Run the validation rule.
     *
     * @param  \Closure(string): \Illuminate\Translation\PotentiallyTranslatedString  $fail
     */
    public function validate(string $attribute, mixed $value, Closure $fail): void
    {
        $value = (string) $value;
        $zxcvbn = new Zxcvbn;
        if ($zxcvbn->passwordStrength($value)['score'] < 3) {
            $fail('Password is not secure enough!');
        }
    }
}