fix modules and FileUpload class

kernel/modules/user/models/forms/CreateUserForm.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace kernel\modules\user\models\forms;
+
+use kernel\FormModel;
+
+class CreateUserForm extends FormModel
+{
+
+    public function rules(): array
+    {
+        return [
+            'username' => 'required|min-str-len:5|max-str-len:30',
+            'password' => 'required|min-str-len:5|max-str-len:30',
+            'email' => 'required|email'
+        ];
+    }
+
+}