How to mention a list of user from a multi user field with jira automation?

[Manuel]

With an automation, I like to mention all affected users eg when issue is done saying the bug you reported got completed.

I added a custom field "Affected Users".

Mentioning a single user is explained in: Solved: Automation: How to @mention user in Add Comment ac... (atlassian.com)

However the multi user field provides an array of users as response thus  [~accountid:...] is not working

{{issue."Affected Users"}}

[~accountid:{{issue."Affected Users"}}]

as it result in:

[Manuel · Accepted solution]

Can be achieved with smart values list.join(separator) as 

{{#issue."Affected Jira Users"}}[~accountid:{{.}}], {{/}}