Convery InputObject to Key Name?

I know I can do

if key.KeyCode == Enum.KeyCode.A then
    --code A
end
if key.KeyCode == Enum.KeyCode.B then
    --code B
end
if key.KeyCode == Enum.KeyCode.C then
    --code C
end

--etc

but I don't want to check for every separate key. I want to return whatever key the player presses. This might be a stupid question, I just couldn't find the answer anywhere. Help?