How to get the BUILD_USER in Jenkins when job triggered by timer?

Question

I wanted to show the user who triggered a Jenkins job in the post job email. This is possible by using the plugin Build User Vars Plugin and the env variable

Answer 1

This gets the username who clicked "Build Now" in a Jenkins pipeline job.

@NonCPS
def getBuildUser() {
    return currentBuild.rawBuild.getCause(Cause.UserIdCause).getUserId()
}