Detecting Return keycode from a mobile device?

I've made a working chat script, but it cant detect when the player hits return on mobile.

Basically what I'm asking is: How to detect when a mobile device presses return on their keyboard for chat?

I've already tried:

InputService.InputBegan:connect(function(Key)
    if Key.KeyCode == Enum.KeyCode.Return then
        --stuff in here
    end
end)

And it didn't work so can someone help me?