This is a very good feature request, however, I can’t share any ETA for such development.
But I agree it would be better to use user key not username to authorize imports.
Could you please share more details about cases when you change username?
That is not that common practice (to change usernames) in Jira as I know.
Hello, We are using e-mail as an username. I would say that is quite common practice. Problem is that our company re-brands from time to time. It means slightly different name and sometimes even domain. That that renames all user accounts - even service accounts which are usually used for integration purposes or import in EazyBI.