Change User on Post

Hi everyone,

We got hacked a few months ago and I have uploaded our backup. However, every post is showing up as myself in the drafts. Is there a way for me to change the user from my admin side per post or do I have to logout/login differently/paste it etc…? I am asking because we have 3 years of stuff and MULTIPLE users.

Best wishes,
Stewart
https://www.defencereport.com