Automation: Update People field with values from another people field

[Kevin Cressy]

I am using a Team-Managed Kanban Project.

Hi I am trying to use automation to update a people field based on the values from other people fields.

I have three fields:

1. "Assignee" (this is the standard Jira field)
2. "Project Team Members" this is a custom people field, and can contain multiple people.
3. "Managers" this is a custom people field, and can contain multiple people.
4. "All Team Members" this is a custom people field, and can contain multiple people.

I want to update the "All Team Members" if any of the fields in 1, 2 or 3 above are changed.  The "All Team Members" members field should then include all people from 1, 2 and 3.

I have been playing with the "Edit issue fields" Automation but haven't managed to find the correct code to make this work.

I have managed to update the "All Team Members" field with the Assignee using the code below, but that is as far as I have got.

{
"update": {
"All Team Members": [
{
"add": {"id":"{{issue.assignee.accountId}}"} 
}
]
}
}

[Kevin Cressy · Accepted solution]

Appologies I posted this to the wrong forum.  Reposted here: https://community.atlassian.com/t5/Team-managed-projects-questions/Automation-Update-custom-people-field-with-user-values-from/qaq-p/2100388#M5607