How to share PS+ with all its benefits with two users on two different PS4s?

So the situation is like this:

A has PS4 #1 and PSN #1 account

B has PS4 #2 and PSN #2 account

I have a 12 month PS+ code which I will redeem but I dont know how exactly I should do this.

In the end I want to have PS+ (online gaming) and Game Sharing for both of us.