Shared accounts

So I was talking to my friends that I wanted to play again SMM2 so bad; I had the game and I get robbed

One told me

Dude I purchased it virtually; if u want I can let u my account so u can download the game

I was so excited and obviously accepted and procede to do it

Well… after that I tried to play on my account but I can’t so he told me: use my account

So there’s no way I can play on my account? :/

Yeah I wanted to play in my account cause I pay the online an there’s my progress

So yup

Anyone here had an advice for me?