db changes in v2


hi all!
i purchased time ago xenforo1 and I made some php pages to interact into xenforo db (most of them linked to the user fields)..
in v2 the db is totally different or not?
I also use https://github.com/VinceG/xenforo-sdk to get user info etc...
is there something similar or I need to do all from scratch?
thanks in advance
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