Script example

--Basic cash data script

local dss = game:GetService("DataStoreService")

local store = dss:GetDataStore("cash")

game.Players.PlayerAdded:Connect(function(plr)
local fold = Instance.new("Folder", plr)
fold.Name = "leaderstats"

local data = store:GetAsync(plr.UserId)

if data == nil then
data = 0
end

local int = Instance.new("NumberValue", fold)
int.Value = data

int.Name = "Cash"
end)

while wait(20) do
for i,v in pairs(game.Players:GetChildren() do
v.leaderstats.Cash.Value += 100
end
end

game.Players.PlayerRemoving:Connect(function(plr)

store:SetAsync(plr.UserId, plr.leaderstats.Cash.Value)
end)