Using ServiceNow Create Jira Issue not able to set Assignee with user_name

[thorngje]

ServiceNow Create Jira Issue REST API sends a valid user_name to Jira but the created issue assignee field does not update to the valid user_name passed in the REST API.

I have had this working in the past but seems as if has stopped working.   Is there a system log on Jira side I can check for issue created and assignee value.

Issue created screen shot.

[thorngje · Accepted solution]

need to user accountId to set assignee.