diff --git a/patterns/iron-session.md b/patterns/iron-session.md
index 41da259..f979904 100644
--- a/patterns/iron-session.md
+++ b/patterns/iron-session.md
@@ -1,3 +1,8 @@
+# Patroon: iron-session
+
+## lib/session.ts
+
+```ts
 import { SessionOptions } from 'iron-session'
 
 export interface SessionData {
@@ -14,3 +19,16 @@ export const sessionOptions: SessionOptions = {
     sameSite: 'lax',
   },
 }
+```
+
+## Gebruik in Server Action of Route Handler
+
+```ts
+import { getIronSession } from 'iron-session'
+import { cookies } from 'next/headers'
+import { SessionData, sessionOptions } from '@/lib/session'
+
+const session = await getIronSession<SessionData>(await cookies(), sessionOptions)
+if (!session.userId) redirect('/login')
+if (session.isDemo) return { error: 'Niet beschikbaar in demo-modus' }
+```