Module Returning Help

My Module Script looks like this:

local myId = {621955678}

return {myId}

And this is my server script:

local mod = require(script.Parent.MainModule)

game.Players.PlayerAdded:Connect(function(plr)
	for i,v in pairs(mod) do 
		if plr.UserId == v then 
			print(v)
		end
		end
end)

But nothing prints so what did I do wrong?

You are returning a table that is nested inside another.

Simply remove the parentheses from myId.