how do you make a surface gui text button return the player who clicked?

here's what i have so far it errors saying p is a number value

local textbutton=script.Parent
local allowed={'Player','Player1','Player2'}
textbutton.MouseButton1Down:connect(function(p)
	for i,v in pairs(allowed)do
		if p.Name:lower()==v:lower()  then
			print'allowed'
		else print'not allowed'
		end
	end
end)