Codeigniter 4 - Controller - Insert validate

<?php

namespace App\Controllers;

use CodeIgniter\RESTful\ResourceController;

class Learn extends ResourceController
{

    public $user;

    public function __construct()
    {
        $this->user = model( 'UserModel' );
    }

    public function create()
    {
        try {

            $data       = $this->request->getPost();
            $this->user = $this->user->fill( $data );

            if (isset( $data['showPrefix'] ) && $data['showPrefix'] === 'on') {
                if (strlen( $data['prefix'] ) <> 4) {
                    throw new \RuntimeException( "'Prefix must be exact 4 chars length'" );
                }
                $this->user->login = trim( $data['prefix'] . $data['login'] );
            }

            // Have commented out this code, as when we use password hashing function with fill,
            // our hashed password will be longer, than clean password and it will prevent validation rule
            // for password min_length[8]..

            // if (isset($data['password']) && strlen( $data['password'] ) < PASSWORD_MIN_LENGTH) {
//                log_message( 'info', 'pw min length error' );
//                return $this->fail( 'Password minimum length is ' . PASSWORD_MIN_LENGTH );
//            }
            //                  ^
            // INSTEAD OF THIS  | => GO TO LINE(64)

            // Validation @ Models/User
//            protected $validationRules = [
//                'login'    => [
//                    'rules' => [
//                        'required',
//                        'min_length[' . LOGIN_MIN_LENGTH . ']',
//                        'max_length[' . LOGIN_MAX_LENGTH . ']',
//                        'is_unique[accounts.login]',
//                        'regex_match[/^([a-zA-Z0-9_])\w+$/]'
//                    ],
//                ],
//                'password' => [
//                    'required',
//                    'min_length[' . PASSWORD_MIN_LENGTH . ']',
//                    'max_length[' . PASSWORD_MAX_LENGTH . ']'
//                ],
//                'email'    => [
//                    'required',
//                    'valid_email',
//                ]
//            ];

            // 64 LINE, WE USE THIS @ App\Entities\User
            // set when we set password by entity $userEntity->password('asdd') || $userEntity->password = 'asd';
            // we will get error, maybe there is better variants (and there is, but im showing what i know/done yet :( )
//            public function setPassword(string $pass): static
//            {
//                try {
//                    helper( 'lineage' );
//
//                    if (strlen( $pass ) < PASSWORD_MIN_LENGTH) {
//                        throw new \RuntimeException( lang( 'Validation.min_length', [ 'min_length' => PASSWORD_MIN_LENGTH ] ) );
//                    }
//
//                    if (strlen( $pass ) > PASSWORD_MAX_LENGTH) {
//                        throw new \RuntimeException( lang( 'Validation.max_length', [ 'max_length' => PASSWORD_MAX_LENGTH ] ) );
//                    }
//
//                    $this->attributes['password'] = hashPassword( $pass );
//                } catch (\RuntimeException | \Exception $e) {
//                    throw new \RuntimeException( $e->getMessage() );
//                }
//                return $this;
//            }

            // Validate before insert action
            if (!$this->validation->run( $this->user->toArray(), 'user', L2J_LS )) {
                return $this->fail( $this->validation->getErrors() );
            }

            $user_id = $this->model->insert( $this->user );

            if ($this->model->errors()) {
                log_message( 'debug', 'model errors: ' . print_r( $this->model->errors(), true ) );
                return $this->fail( $this->model->errors() );
            } else {
                // $user_id available if need
            }

            return $this->respondCreated( lang( 'User.user_created' ) );

        } catch (\Exception $e) {
            ErrorHandler::handle( $e );
            return $this->fail( $e->getMessage() );
        }
    }
}