I have the urge to steal someone's spotify account.
What makes you want to steal their account?
Because they lied to me in the past and I want to get revenge on them.
No matter how much they hurt or wronged you, it is just as bad to be a thief to them. You don't need to stoop to their level to get even. It is better to just forget them so you never hard to be hurt again.
I am trying to punish them for what they did
I know they wronged you and you want to get even with them. But understand taking the account isn't going to solve any issues between you two. I would recommend talking with them about what's going on and seeing if you could resolve these issues.