Artifactory plugin requires 'setup_user -cli gradle' to be executed in front of the build

I'm working with gradle 4 on intelij. in my train.yaml file in setup tag I have added

*setup: &setup
    -script: setup_user -cli gradle*

and using this variable in before build as follows

before_build: *setup

Still I'm getting the error

Artifactory plugin requires 'setup_user -cli gradle' to be executed in front of the build

how we can mitigate this issue and what is the significance of this setup_user