Why won't my datastore save and load? ;-;

So I've got my datastore for onPlayerAdded which is

local DataStore = game:GetService('DataStoreService'):GetDataStore("StatStore")

game.Players.PlayerAdded:connect(function(player)
	
	local stats = Instance.new("IntValue",player)
	stats.Name = "Stats"
	local level = Instance.new("IntValue",stats)
	level.Name = "Level"
	local magic = Instance.new("IntValue",stats)
	magic.Name = "Magic"
	local stam = Instance.new("IntValue",stats)
	stam.Name = "Stamina"
	local cur = Instance.new("IntValue",stats)
	cur.Name= "Drake"
	local xp = Instance.new("IntValue",stats)
	xp.Name="EXP"
	xp.Value = 0

	xp.Changed:connect(function()
		if xp.Value>math.pow(1.5,player.Stats.Level.Value-1)*100 then
			xp.Value = 0
			player.Stats.Level.Value=player.Stats.Level.Value+1
			print("Level up")
		end
	end)

	local key = "player-"..player.UserId
	
	local savedValues = DataStore:GetAsync(key)
	
	if savedValues then
		--Save format:  {level, magic, stam, xp, cur}
		level.Value = savedValues[1]
		magic.Value = savedValues[2]
		stam.Value = savedValues[3]
		xp.Value = savedValues[4]
		cur.Value = savedValues[5]
	else
		local ValuesToSave = {level.Value,magic.Value,stam.Value,xp.Value,cur.Value}
		DataStore:SetAsync(key,ValuesToSave)
	end
end) 

Then I got my save on playerLeaving script

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

game.Players.PlayerRemoving:connect(function(player)
	
	local key = "player-"..player.UserId
	
	local ValuesToSave = {player.Level.Value, player.Magic.Value, player.Stamina.Value, player.EXP.Value, player.Drake.Value}
	DataStore:SetAsync(key, ValuesToSave)
end) 

I don;t understand as to why it wont save or load, I have tried different things for ValuesToSave

You would need to put tostring before player.userId as player.userId goes between the parentheses of tostring as player.userId is an integer data type. And the u is lowercase in userId always.