Why isn't this data store saving? The Pcall says it is working

local ds = game:GetService("DataStoreService")
local player = game:GetService("Players")
local rep =  game:GetService("ReplicatedStorage")
local statsf = rep:WaitForChild("Stats")
local datastore = ds:GetDataStore("Stats")
local function saveData(player) 
    local speed = statsf:WaitForChild(player.Name):WaitForChild("Speed")
    local strength = statsf:WaitForChild(player.Name):WaitForChild("Strength")
    local data = {
        speed.Value,
        strength.Value
    }

    local success, err = pcall(function()
        datastore:SetAsync(player.UserId, data) 
    end)

    if success then
        print("Data has been saved!")
    else if err then
        print("Data hasn't been saved!")
        warn(err)       
        end
    end
end

player.PlayerAdded:Connect(function(plr)
        local userID = plr.userId
        local stats = Instance.new("Folder")
        wait (.1)
        stats.Parent = statsf
        stats.Name = plr.Name

        local Speed = Instance.new("IntValue")
        Speed.Name = ("Speed")
        Speed.Parent = stats

        local Strength = Instance.new("IntValue")
        Strength.Name = ("Strength")
        Strength.Parent = stats
        local data
    local success, err = pcall(function()
        data = data:GetAsync(player.UserId)

    end)
    if success then 
        Speed.Value = data[1]
        Strength.Value = data[2]
    elseif err then print ("No data found")
        Speed.Value = 12
        Strength.Value = 0
    end
end)

game.Players.PlayerRemoving:Connect(function(player)
    local success, err  = pcall(function()
        saveData(player) 
    end)

    if success then
        print("Data has been saved")
    elseif err then
        print("Data has not been saved!")
    end
end)

game:BindToClose(function() 
    for _, player in pairs(game.Players:GetPlayers()) do 
        local success, err  = pcall(function()
            saveData(player)
        end)

        if success then
            print("Data has been saved")
        elseif err then
            print("Data has not been saved!")
        end
        end
        end)

Also, if there is any way to improve upon this script, let me know! Thank you