how to use OnKeyDown so it doesn't block other addon nor the game itself

[fatrog]

Hello,

I have this part in my addon

local function onKeyDown(self, key)
    -- code
end
 
local frame = CreateFrame("Frame")
frame:EnableKeyboard(true)
frame:SetScript("OnKeyDown", onKeyDown)

Obviously, as it is written down in the api, it block everything else to use keyboard events. So, what is the method to know what key is pressed without blocking everything?