Could someone help me fix my datastore? No matter what I do it doesn't save.

Im trying to setup a datastore for my game. I have the datastore and leaderboard setup but whatever I try I can't get the data to save.

Datastore in ServerScriptService:

local DataStoreService = game:GetService("DataStoreService")
local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
 
local playerCoinsStore = DataStoreService:GetDataStore("PlayerCoinsStore")
 
local playerNotificationEvent = Instance.new("RemoteEvent")
playerNotificationEvent.Name = "PlayerNotificationEvent"
playerNotificationEvent.Parent = ReplicatedStorage
 
local playerCoins = {}
 
local function onPlayerAdded(player)
	local playerId = tostring(player.UserId)
	local success, coins = pcall(function()
		return playerCoinsStore:GetAsync(playerId)
	end)
	if success then
		playerCoins[player] = coins
	else
		playerNotificationEvent:FireClient(player, "Error retrieving saved data: please try again later")
	end
 
	-- Do other player initialization code
end
 
Players.PlayerAdded:Connect(onPlayerAdded)

Leaderboard in ServerScriptService:

local DataStoreService = game:GetService("DataStoreService")
local playerCoinsStore = DataStoreService:GetDataStore("PlayerCoinsStore")
function onPlayerEntered(newPlayer)

	local stats = Instance.new("IntValue")
	stats.Name = "leaderstats"
	
	local coins = Instance.new("IntValue")
	coins.Name = "Coins"      
	pcall(function(player)
		coins.Value = playerCoinsStore:GetAsync("coins")
	end)

	coins.Parent = stats
	
	stats.Parent = newPlayer
end

game.Players.ChildAdded:connect(onPlayerEntered)



while wait(2) do 
	for _, player in ipairs(game.Players:GetPlayers()) do
		if player:FindFirstChild("leaderstats") then
			player.leaderstats.Coins.Value = player.leaderstats.Coins.Value + 1
		end
	end
end

--Autosave

 while wait(5) do
	pcall(function(player)
	    playerCoinsStore:SetAsync("coins", player.leaderstats.coins.Value)
	end)
	end

Im probably doing something really dumb. I just started learning a few days ago so any help will be appreciated. Thanks!