SetAsync not actually saving when player leaves game?

I am trying to make save and load, but I ran into one problem: SetAsync does not save, unless I set it manually. I have tried datastore plugins such as DataStoreX, but none have worked. Code:

local DataStoreService = game:GetService("DataStoreService")
local dataStore = DataStoreService:GetDataStore("DAT")

game.Players.PlayerAdded:Connect(function(player)
    local coins = Instance.new("IntValue")
    coins.Name = "coins"
    coins.Parent = player

    local playerUserId = "Player_"..player.UserId
    local success, err = pcall(function()
        coins.Value = dataStore:GetAsync(playerUserId)
    end)

    if success then
        print("Load success!")
    else
        warn(err)
    end
    print(player.coins.Value)
end)

game.Players.PlayerRemoving:Connect(function(player)
    local success, err = pcall(function()
        print(player.coins.Value)
        local playerUserId = "Player_"..player.UserId
        dataStore:SetAsync(playerUserId, player.coins.Value)
    end)

    if success then
        print("Save success!")
    else
        warn(err)
    end
end)

game:BindToClose(function()
    wait(5)
end)

NOTE #1: I TRIED SAVING IN BOTH BINDTOCLOSE AND PLAYERREMOVING, BUT IT STILL DIDN'T SAVE. NOTE #2: I'M RUNNING INSIDE ROBLOX STUDIO