Doesn't exist, you should not try anyway cheats, it ruins the game for others and you will not feel anything after some matches because is just easy for you to play, everytime the cheats will be detected only if you're the owner of a cheat that you made yourself only for you, this is how you could never get caught, otherwise you have no chance with buying cheats or using some free ones.
you will get reported and banned by overwatch, try using the console command: "exec lab" I had good experience with 5dollarcheats. they were quite good for the price