I'm having issues with data store?

Here's the script: It always attempts to load but says there isn't anything there, im sure the problem is at the green dashed line.

DataStore = game:GetService("DataStoreService"):GetDataStore("BSI")
Players = game:GetService("Players")

game.Players.PlayerAdded:connect(function(player)

local Kills = Instance.new("IntValue", leader)
    Kills.Name = "Kills"

    local key = "user "..player.userId
    local Saved = DataStore:GetAsync(key)
    print (Saved[1])
    Kills.Value = Saved[1] or 0
    DataStore:SetAsync(key, Saved[1])
    print (key, Saved[1])
end)

game.Players.PlayerRemoving:connect(function(player)
    local key = "user "..player.userId
    print (key.." left")
    local ToSave = player.leaderstats.Kills.Value
    print (ToSave.." value")
    DataStore:SetAsync(key, 1 == ToSave) -----------------------
    print (key, ToSave)
    print 'SAVED'
end)