How to get application user instead of delegating app user Groovy

[arama mihai]

Hello, 

I am trying to create a script that copies the value from a select list field, adds a suffix to it, and then creates a label with that string, upon issue creation. The post function is:

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.user.ApplicationUser
import com.atlassian.jira.user.util.UserManager
import com.atlassian.jira.issue.label.LabelManager
import com.atlassian.jira.issue.Issue;
import com.atlassian.jira.security.JiraAuthenticationContext;

def issueManager = ComponentAccessor.getIssueManager()
def customFieldManager = ComponentAccessor.getCustomFieldManager()

def ScrumTeamObject = customFieldManager.getCustomFieldObject(12205)
def ScrumTeamValue = issue.getCustomFieldValue(ScrumTeamObject).toString()
ScrumTeamValue.replaceAll(" ","_")
def suffix = "_Team"
def labelToAdd = ScrumTeamValue + suffix

JiraAuthenticationContext authContext = ComponentAccessor.getJiraAuthenticationContext()
ApplicationUser user = authContext.getLoggedInUser()

LabelManager labelManager = ComponentAccessor.getComponent(LabelManager)
labelManager.setLabels(user,issue.id,labelToAdd,false,false)

The error is :

2021-06-04 11:19:09,668 ERROR [workflow.AbstractScriptWorkflowFunction]: Workflow script has failed for user 'abc'. View here: https://jira-abc/secure/admin/workflows/ViewWorkflowTransition.jspa?workflowMode=live&workflowName=abc&descriptorTab=postfunctions&workflowTransition=1&highlight=1
groovy.lang.MissingMethodException: No signature of method: com.atlassian.jira.issue.label.DefaultLabelManager.setLabels() is applicable for argument types: (com.atlassian.jira.user.DelegatingApplicationUser, null, String...) values: [MARAMA(JIRAUSER83105), null, Engineering_Team, false, false]
Possible solutions: setLabels(com.atlassian.jira.user.ApplicationUser, java.lang.Long, java.util.Set, boolean, boolean), setLabels(com.atlassian.jira.user.ApplicationUser, java.lang.Long, java.lang.Long, java.util.Set, boolean, boolean)
at Script154.run(Script154.groovy:22)

We are using crowd, Jira 8.5.3 . How do I get an application user so that I can set the labels?

Thank you!

[arama mihai · Accepted solution]

Labels needs to be a set, not a string