Redirection How to redirect all the users profile pages

Hi all!

I have a site with a bunch of authors from a custom post type (which is “questions”) and I don′t use that custom post type but I have to redirect all the old profiles.

The old users still have posts on my site therefore I would like to redirect /questions/users/ to /author/

eg. Old url: domain.com/questions/users/username –> to: domain.com/author/username

Is this possible on htaccess using variables or do I have to do all the redirection one by one?

Can someone point me the way?

Thanks!