Scripts don't work? + Screenshot

local points = game:GetService("DataStoreService"):GetDataStore("Points")
local text = script.Parent.TextLabel
while wait() do
	text = "Coins : ".. points
end

And This

local DataStore = game:GetService("DataStoreService"):GetDataStore("Points")

game.Players.PlayerAdded:connect(function(player)
	local key = "user_".. player.userId
	DataStore:UpdateAsync(key, function(oldValue)
		local newValue = oldValue or 0
		newValue = newValue + 50
	end)
end)

Do not work. How do I make these work? They should work, but this screen shot here shows 0 Coins (Yes I know, I'm not in game, but i tested it and they still do not work): http://prntscr.com/8mdigh

Easy, assuming the script is a LocalScript in a screen gui:

local player=game:service'Players'.localPlayer
repeat wait() until player
local points = game:GetService("DataStoreService"):GetDataStore("Points")["user_"..player.userId]
local text = script.Parent.TextLabel
while wait() do
    text.Text = "Coins : ".. points
end

you need Text property, as the TextLabel is an object

also, the second one can be fixed too:

local DataStore = game:GetService("DataStoreService"):GetDataStore("Points")

game.Players.PlayerAdded:connect(function(player)
    local key = "user_".. player.userId
    local data=DataStore[key]
    if not data then
		DataStore[key]=0
    end
    DataStore:UpdateAsync(key, function(oldValue)
        newValue = newValue + 50
    end)
end)

If it doesn't work, tell me ;p