Special Play Condition

I want to implant secret heroes into my new map, only people with the bnet names of the creators/editors for my map will be able to use this text command to get a secret hero. I know it's been done, but i'm not sure how to do it.

You could probably just use a trigger that has the event as player 1(or any player) types the chat -fhqwhgads (or some random thing), then as the condition use string comparison. Have the (player name of(triggering player)) equal to Oxalic (or the player name). The event should be the hero making event. That probably should work :>