add user

app/services/UserService.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace app\services;
+
+use app\models\User;
+use kernel\FormModel;
+
+class UserService
+{
+
+    public function create(FormModel $form_model): bool
+    {
+        $model = new User();
+        $model->username = $form_model->getItem('username');
+        $model->email = $form_model->getItem('email');
+        $model->password_hash = password_hash($form_model->getItem('password'), PASSWORD_DEFAULT);
+        return $model->save();
+    }
+
+}