Good day!
I am desperately trying to automate this flow:

Using this smart value:
{{#issue.comments}}{{body.match("((\w+\.\w+)(?=].*merge request))")}}{{/}}
Sadly, I get notified that the user is unknown:

Should I be changing the assignee of the issue in another way, perhaps using a key instead of the name.surname?
I tried using edit issue field and a custom payload but could not manage either.
Furthermore, I obtain this value by reading the comment left by gitlab integration, hence why I only get the name.surname, that coincidentally is always the same as the name of the jira user.