DeactivateUser.groovy

package examples.usermgr

import com.atlassian.crowd.embedded.impl.ImmutableUser
import com.atlassian.jira.bc.user.UserService
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.Issue

/**
 * Remove user from all groups and deactivate
 */

/* CONFIGURABLE SECTION */

// custom field names
final def userNameField = "Username"
/* END CONFIGURABLE SECTION */

def issue = issue as Issue


def customFieldManager = ComponentAccessor.getCustomFieldManager()
def customFields = customFieldManager.getCustomFieldObjects(issue)
def userUtil = ComponentAccessor.getUserUtil()

[userNameField].each {fieldName ->
    def field = customFields.find { it.name == fieldName }
    assert field // fields not found or not associated with issue
}

def username = issue.getCustomFieldValue(customFields.find {it.name == userNameField}) as String

def userService = ComponentAccessor.getComponent(UserService.class)
def user = userUtil.getUserByName(username).getDirectoryUser()
def updateUser = ImmutableUser.newUser(user).active(false).toUser()
def updateUserValidationResult = userService.validateUpdateUser(updateUser)

if (updateUserValidationResult.isValid()) {
    userService.updateUser(updateUserValidationResult)
} else {
    log.warn "Update of ${user.name} failed: ${updateUserValidationResult.getErrorCollection().getErrors().entrySet().join(',')}\n"
}