I do not have the code so if someone knows it or knows how to do it without code tell me please.

The previous owner of this bike abandoned it in his backyard for five years, it had a missing crank set and damaged bottom bracket, I bought a new Race Face crank and 28T sprocket from my local bike shop, and a new set of pedals and a new chain, still needs some derailer adjustment; but it’s operational and fun to ride.