Git Gud

After you meet them in the game (invade/be invaded/summoned/coop ect.) go to steam overlay > view players (it's right below where it shows all your friends on the left) > click the recent games tab.

how do you find someones steam username in ds2?

u wut m8?

Yep. I rekt you in a match and you were being a prick in some way so I invited you.

so did i meet you in Das2? cause i have been playing a bit of both recently.