Delete icloud

All purchases made using an Apple ID are tied to the ID. Delete the ID and you will need to download them using your new ID. Make sure you sign out from the places in the 4th link before deleting the ID.

How to delete your Apple ID account

Apple ID – How to Delete

Delete Apple ID (new)

What to do after you change your Apple ID or password - Apple Support     

See the information in: Understand and control the personal information that you store with Apple - Apple Support