add all controllers logic

app/Http/Requests/Settings/SettingsUpdateRequest.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Http\Requests\Settings;
+
+use App\Http\Requests\ApiFormRequest;
+
+class SettingsUpdateRequest extends ApiFormRequest
+{
+    public function rules(): array
+    {
+        return [
+            'site_name' => ['nullable', 'string', 'max:255'],
+            'administrator_email' => ['nullable', 'email', 'max:255'],
+            'timezone' => ['nullable', 'string', 'max:80'],
+        ];
+    }
+}