Can I hack the Facebook ID of my friend?

First of all must do information gathering about target and system

1. You can use fishing technique which is easy for beginners .
2. If you get access to victim phone/email then you can think that you done everything(think on it,how?).
3. You can use key logger if you get access to system.
4. You can use session hijacking if you have expertise in it(use wire-shark).

I one word "you can't"