CRM : Blueprint Transition - Function - 'Transition User'

CRM : Blueprint Transition - Function - 'Transition User'

Hi,

During the Blueprint transition "After" phase, I want to call a custom function.

Within the function arguments - what is the correct field where I can access the USERID of the user who initiated the transition? Would that be Last Modified By?

Also, in a the field update action - is there a placeholder such as ${CURRENTUSER} - or do I need to use the function to do this.



Thanks
Joe