Specify default player character

I’m trying to modify ThirdPersonCPP template to use my own (C++) character class.

The problem is although instance of that character already exists in the world, when I press “Play” button, editor spawns another instance of character.

Why would something like that happen, and is there a way to specify character that already exists in the world as “default”?

Figured it out.

I needed to select “Player 0” from “Auto Possess player” (Pawn section in detail window).