Add an ability for a "Secret" node input

I'm writing a custom node right now that takes in an api key and a url. I want to be able to have those two strings be inputs to the card, but I don't want those strings to also be exported when I save the image with info. I could strip the info out before I save the image off, but I'd rather be able to have something to specify "hey, these primitives are secret and the contents should not be exported with the workflow"