Buying myself a PS4 and need advice on transferring games / data from my old (family) PS4.

So I know how to do the whole data transfer thing from my psn account but i have a problem.

Last year i forgot my PSN info so couldn't log into my psn which meant i had to use my brother's account to purchase Skyrim on ps4. I was able to use the app with my account as both accounts were set to that ps4 as the primary console. However, now i'm getting my own ps4 i need to somehow transfer Skyrim from my brother's PSN onto my PSN otherwise i won't be able to use it. How do i go about doing this?