Added placeholder users; Better exception handling; Enhanced local setup

app/Service/UserService.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Models\Organization;
+use App\Models\TimeEntry;
+use App\Models\User;
+
+class UserService
+{
+    public function assignOrganizationEntitiesToDifferentUser(Organization $organization, User $fromUser, User $toUser): void
+    {
+        // Time entries
+        dump(TimeEntry::query()
+            ->whereBelongsTo($organization, 'organization')
+            ->whereBelongsTo($fromUser, 'user')
+            ->update([
+                'user_id' => $toUser->getKey(),
+            ]));
+    }
+}