Scripting a coin that can only be collected once?

so im working on a game, yes

ive been trying to script this coin collecting thing. say there's one coin in the game, yes? player 1 collects it, but player 1 won't be able to collect it anymore afterwards cause he has already collected it. player 2 comes along, but is also able to collect it and bla bla (same concept applies)

thing is i know how to make the simple coin script of collecting, but it's only executed simply in a local script:

local StarOrb = game.Workspace.StarOrbs.StarOrb1
local db = true

---

StarOrb.Touched:Connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") ~= nil then
		if db == true then
			db = false
			local player = game.Players:GetPlayerFromCharacter(hit.Parent)
			player.leaderstats.StarOrbs.Value = player.leaderstats.StarOrbs.Value + 1
			wait(0.1)
			script.Sound:Play()
			wait(1)
			db = true
			StarOrb:Destroy()
		end
	end
end)

can someone help me improve this code and modify it? and can someone TEACH (not do it for me) how to use datastore to make it so if the player rejoins, the player STILL cant collect the coin (i already have a datastore that saves the accumulated value)

any help is appreciated and if i was confusing, please let me know. thank you!

I would put all your coins in a folder. Name them differently(I would name them numbers from 1 to how ever many coins there are).

In order to do this, we need to create a DataStore and add the name of the coin when it gets touched in the DataStore. Before we add it to the DataStore, we make sure its not already in the DataStore.

Here is a rough example of what I mean(assuming you named each coin a different number).

local CoinData = game:GetService("DataStoreService"):GetDataStore("CoinData") -- // The data store
local CoinsFolder = workspace.CoinsFolder -- // A folder where all the coins are 

for _,coin in pairs(CoinsFolder:GetChildren()) do
	coin.Touched:Connect(function(hit)
		if hit.Parent:FindFirstChild("Humanoid") then
			local Player = game:GetService("Players"):GetPlayerFromCharacter(hit.Parent)
			local Success, playerData = pcall(function()
				return CoinData:GetAsync(Player.UserId) -- // Get data
			end)

			if Success then
				if not playerData then playerData = {} end -- If we can't find old data, we will create a new table for the player
				if table.find(playerData, coin.Name, 1) == nil then -- If the coin isn't in the data 
					table.insert(playerData, coin.Name)
					Player.leaderstats.StarOrbs.Value = Player.leaderstats.StarOrbs.Value + 1
					coin:Destroy()
					pcall(function()
						coinData:SetAsync(Player.UserId, playerData) -- Save the data
					end)
				end
			end
		end
	end)
end

datastore basically lets you store data in roblox servers... this is done through what we call methods, methods are basically functions of an object.. for instance, RobloxObject:FindFirstChild(), FindFirstChild is a method, it's a function you can call on an object.. keep in mind that roblox objects are not the only example of objects

you can create your own objects, for instance, the following is an object;

local MyObject = {};
MyObject.SayHi = function(who)
	print("Hello "..who,"How are you?")
end

SayHI is a method of MyObject..

so datastore service has methods that let you access Datastore of your game, and methods that let you access specific data, for instance coins for a player.

some methods include GetAsync(datastore_key), SetAsync(datastore_key, value, UpdateAsync(datastore_key, f)...

i don't have time to explain thoroughly, but once i get time i will edit my answer to explain how to properly use Datastore and will show you how to use it for your purpose. meanwhile, you can research and tune in to other answers to see if they help you..