Drain the liquid from the tuna and then place the tuna in a medium mixing bowl.
Add mayonnaise, parmesan and cheddar cheeses, onion, celery, garlic powder, and white sugar. Gently mix to incorporate all the ingredients.
Try to taste the mixture and then add salt and pepper as needed.
Serve. You can make sandwiches, wraps, and finger food out of this recipe. Enjoy!