redesign for mulituser

change validation concept (client and server)
using entities

app/Models/Cast/CastMyDate.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models\Cast;
+//namespace CodeIgniter\DataCaster\Cast;
+use CodeIgniter\Database\BaseConnection;
+use CodeIgniter\Exceptions\InvalidArgumentException;
+use CodeIgniter\DataCaster\Cast\BaseCast;
+use CodeIgniter\I18n\Time;
+
+// The class must inherit the CodeIgniter\DataCaster\Cast\BaseCast class
+class CastMyDate extends BaseCast
+{
+    public static function get( mixed $value, array $params = [], ?object $helper = null,): string {
+        if (! is_string($value)) {
+            self::invalidTypeValueError($value);
+        }
+        
+        if (! $helper instanceof BaseConnection) {
+            $message = 'The parameter $helper must be BaseConnection.';
+
+            throw new InvalidArgumentException($message);
+        }
+
+        $format = $helper->dateFormat['date'];
+
+        return Time::createFromFormat($format, $value)->toLocalizedString($params[0] ?? 'yyyy-MM-dd');
+    }
+
+    public static function set( mixed $value, array $params = [], ?object $helper = null,): string {
+        if ( is_string($value)) {
+            $value = Time::createFromFormat("Y-m-d", $value);
+        }
+        if (! $value instanceof Time) {
+            self::invalidTypeValueError($value);
+        }
+
+        if (! $helper instanceof BaseConnection) {
+            $message = 'The parameter $helper must be BaseConnection.';
+
+            throw new InvalidArgumentException($message);
+        }
+
+        $format = $helper->dateFormat['date'];
+
+        return $value->format($format);
+    }
+}