How to give a player coins every day? + Script not working

I'm wondering, how to give a player in-game points everyday? I've checked the wiki, but people could leave and rejoin the game alot to get lots of points, but how do you restrict it to only once a day? I know you can't use

wait(86400)

because the player will have to be in the game for 24 hours. So how?

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

game.Players.PlayerAdded:connect(function(player)
	local key = "user_".. player.userId
	DataStore:UpdateAsync(key, function(oldValue)
		local newValue = oldValue or 0
		newValue = newValue + 50
	end)
end)

and I mixed it with this :

local points = game:GetService("DataStoreService"):GetDataStore("Points")
local text = script.Parent.TextLabel
while wait() do
	text = "Coins : ".. points
end

one of the scripts is not working because when I join it doesn't show that I have 50 credits.

What You Need To Do

So, the idea is pretty basic right? Daily rewards. Essentially what you have to do is save the user's current time with DataStores when they leave the game, then when they join the game load up that time and compare it to the current time. If the difference is greater or equal to 24 hours then reward them!

****os.time or tick?

As you may know, there are two ways to get the current time for the user. One way, is to use the tick function. This function returns the user's local time. Another way is to use os.time, which is a shared timezone for all OS's.

So, what should you use? Due to tick returning local times, then a user can just change the time on their console and abuse the daily rewards. You definitely don't want any of that happening. So, you need to be using os.time, since it's shared for all consoles.

****Code

--Make your DataStore
local ds = game:GetService('DataStoreService'):GetDataStore('Daily')

--When a player joins
game.Players.PlayerAdded:connect(function(plr)
    --Check if they have any data saved
    local data = ds:GetAsync(plr.userId..'_data')
    if data ~= nil then
        --Get the current time
        local current = os.time()
        --Check if difference is at least a day
        if current - data >= 60*60*24 then

            --[[Reward the player]]

        end
    end
end

--When a player leaves
game.Players.PlayerRemoving:connect(function(plr)
    --Save current os.time to a personal key
    local key = plr.userId..'_data'
    local current = os.time()
    ds:SetAsync(key,current)
end)

Hope this helps!

Don't forget to accept this answer, it gives us both rep!