How do I get the User-Name instead of ID in email notification (html)

Hi Community,

I've created an email notification coupled to a LifeCycle state. The creator of the part has to be mentioned in the notification but I only get the ID.

My HTML: ...${created_by_id}...

How can I change the ID to User-Name? I want to get it as easy as possible inside the E-Mail Message Item.

Thanks in advance for your help.

Dave