Test if a player presses Enter?

I'm making a nature exploration-esque game and I'm inserting text into a GUI and I want to use Enter to advance the text. How would I do it?

Thanks!

Use key:byte()

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()

mouse.KeyDown:connect(function(key)
if key:byte() == 13 then --the code for enter is 13
--Advance the text
end
end)