I want to move my itunes library from one user id to another on same iMac. Both use the same Apple ID for iTunes.

I'm trying to move all my iTunes Music Library that is stored under my wife's user ID on a shared iMac to my user ID (and my association my iTunes Music Library. All of the music in her library was purchased under my Apple ID - so that won't be changing - but I need some help in what steps need to be taken (and in what order) to accomplish this. Thank you in advance.