I have a datastore set up. How would I go about incorporating it into my game to reward people?

So I've set up a datatore. I have three scripts managing it - One that updates when a player joins, one that updates when a player's credit value is changed, and one that updates when a player leaves (This may not work properly, I know, it's just there just in case.)

The datastore itself works perfectly fine. It inserts a credit value into every player. If I change that value in the developer console, leave, and come back, it works fine.

My problem is that I do not know how I am going to incorporate it into my main game script. When a round ends, I want to reward only the players who are still "active" with 15 credits.

I tried getting something up and running all day yesterday. I just could not figure it out and I kept breaking the script.

How would I go about doing this?

My DataStore scripts:

CREDIT REALTIME UPDATE:

local datastore = game:GetService("DataStoreService"):GetDataStore("countdowncreditservice")
game.Players.PlayerAdded:connect(function(player)
    local plyrcredits = player.statistics.credits
    plyrcredits.Changed:connect(function()
            local key = "plyr-"..player.userId
            local savedcredits = datastore:GetAsync(key)
            if savedcredits then
                plyrcredits.Value = savedcredits[1]
            end
    end)
end)

PLAYER JOIN UPDATE:

local datastore = game:GetService("DataStoreService"):GetDataStore("countdowncreditservice")

game.Players.PlayerAdded:connect(function(player)
    local statistics = Instance.new("IntValue",player)
    statistics.Name = "statistics"
    local credits = Instance.new("IntValue")
    credits.Parent = statistics
    credits.Name = "credits"

    local key = "plyr-"..player.userId

    local savedcredits = datastore:GetAsync(key)

    if savedcredits then
        credits.Value = savedcredits[1]
    else
        local savedvalue = {credits.Value}
        datastore:SetAsync(key, savedvalue)
    end

end)

PLAYER LEAVE UPDATE:

local datastore = game:GetService("DataStoreService"):GetDataStore("countdowncreditservice")

game.Players.PlayerRemoving:connect(function(player)
    local key = "plyr-"..player.userId
    local savedvalue = {player.statistics.credits.Value}
    datastore:SetAsync(key, savedvalue)
end)

Your help would be greatly appreciated. Thanks!