Todo-App-Backend/app/Models/UserModel.php

<?php

namespace App\Models;

use CodeIgniter\Model;

class UserModel extends Model
{
    protected $table = 'users';
    protected $primaryKey = 'id';
    protected $useAutoIncrement = false;
    protected $returnType = 'array';
    protected $useSoftDeletes = false;
    protected $allowedFields = [
        'id',
        'email',
        'password_hash',
        'name',
        'avatar_url',
        'settings',
        'created_at',
        'updated_at',
    ];

    protected $useTimestamps = true;
    protected $createdField = 'created_at';
    protected $updatedField = 'updated_at';

    protected $validationRules = [
        'email' => 'required|valid_email|is_unique[users.email]',
        'password_hash' => 'required',
    ];

    protected $validationMessages = [
        'email' => [
            'required' => 'Email is required',
            'valid_email' => 'Please enter a valid email address',
            'is_unique' => 'This email is already registered',
        ],
    ];
}