CB Auto Actions - Kunena Forum Create Topic query

Hi All

Hope someone can assist me with this. I'd like to create a rule which does the following.
onAfterUserRegistration - Create new kunena forum topic, with the new user registration "name" as the Subject of the topic.
It allows me to type in a set topic subject, however i want this to be auto-populated with the username associated to that new registration.

Anyone know how I can achieve this?

Many thanks!
Tom

You can use substitutions in it so you could set subject to [username] if you want it to be username for example. See the below for substitution usage information.

www.joomlapolis.com/documentation/279-community-builder/tutorials/18353-using-substitutions-throughout-cb