Basic signup for events

app/ValueObjects/Age.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\ValueObjects;
+
+class Age {
+    function __construct(private \DateTime $birthday) {
+    }
+
+    public function getAge() : int {
+        return (new \DateTime())->diff($this->birthday)->y;
+    }
+
+    public function isfullAged() : bool {
+        return $this->getAge() >= 18;
+    }
+}