Adding Addition Square Accounts to PS4

Hi everyone! I recently upgraded from the PS3 version to the PS4 and am loving the game so far. So much that my roommate would like to play as well!

My question is, is how would I go about adding his account to my PS4? Currently he purchased the Windows version but is having some PC issues and will likely play the PS4 instead.

Right now, we have 1 PS4 and two Sony Entertainment Network (SEN) accounts. I understand that he would have to purchase a PS4 copy, and I was wondering if someone could confirm this process before we do it:

-Roommate buys a PS4 license
-Roommate logs into the PS4 under his SEN
-Roommate 'redeemds' the product key (using his SEN)
-Roommate launches the game and logs in

Is that correct? Or did I overlook a step?

Any help would be great...thank you!

Yup. As long as he has his own SEN, and SE Account and signed in correctly. Once signed in, the SE Account will be linked to SEN.