Added the ability to manage a group of users.

app/Policies/Policy.php

@@ -0,0 +1,24 @@
+<?php declare(strict_types=1);
+
+namespace App\Policies;
+
+use App\Models\User;
+use Illuminate\Auth\Access\HandlesAuthorization;
+
+abstract readonly class Policy
+{
+    use HandlesAuthorization;
+
+    /**
+     * @param User $user
+     * @return bool|null
+     */
+    final public function before(User $user): ?bool
+    {
+        if ($user->is_admin) {
+            return true;
+        }
+
+        return null;
+    }
+}