In the sample project you can look at the "Player_Close" game object (which is disabled by default), but in a general case you need to add a "Top Down Melee" component to your character (in which you will need to add a reference to a prefab containing a "Melee Attack Controller" component), and changes its "attack config" in its "Character Stats Handler" component to be a Melee attack config (in the sample project there is the "PlayerSwordSlash" config. I don't know if that's what you wanted.