I accidentally hacked into my friends account

The first step you should take is ask yourself why you just announced to the Boards that you hacked into your friend's account.

The second thing you should do is either delete this thread or wait for a Riot employee to do it for you.

Lastly, you should hope you don't get banned if you're not trolling.

Umm a accident is something that was not done intentionally. In order for you to "hack" into his account you made a decision.

egh fuck it im loggin out this is boring and i could only do something illegal with it

Flame and feed. Get your friend a gift.

Guessing someone's password isn't hacking.