How to get repository change committer user name from Bamboo build plan variable? Edited

[Sarkis Chakarian]

What I would like to do is to get plan repository revision and the user name of the committed change for that revision by utilizing bamboo build-time variables. I was able to get the repository revision from this variable:

Bamboo VAR: ${bamboo.planRepository.1.revision}
Powershell VAR: $Env:bamboo_planRepository_1_revision

But I need to get the user name of the committer who's change triggered the CI. Is there such a variable?

Please take a look at the following screenshot: