Add the crushed pineapple, tomato sauce, tamari, ginger powder, and garlic powder to the pot. Stir to coat evenly, then cover the pot and turn the vent to Sealing. Cook on Manual for 10 minutes. After the 10 minute cook time, let the pressure release naturally for 5 minutes before releasing the rest of the pressure manually. Taste the mixture, and add additional seasonings as desired (extra tamari, ginger powder, garlic powder, or salt).