Why doesn't this datastore work?

Hey. Within my mainscript for my game, I have a frequent use of DataStores. I must not be using them correctly, because they don't seem to work. It doesn't give me any "BlitzCredits" for winning. I do not earn a win on my leaderboard. Everything worked fine until I tried to use the datastores.

Heres where I set up the datastores...

function playeradded(player)

    local mydata = datastore:GetAsync(player.userId) or {}
    mydata.wins = mydata.wins or 0
    mydata.BC = mydata.BC or 0
    mydata.hyperlaser = mydata.hyperlaser or 0

    playerdata[player.userId] = mydata


    local leaderstats = Instance.new("Model")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player


    local wins = Instance.new("IntValue")
    wins.Name = "Wins"
    wins.Value = mydata.wins
    wins.Parent = leaderstats

    local hyperlaser = Instance.new("IntValue")
    hyperlaser.Name = "Hyperlaser"
    hyperlaser.Value = mydata.hyperlaser
    hyperlaser.Parent = player

    local BC = Instance.new("IntValue")
    BC.Name = "BlitzCreditz"
    BC.Value = mydata.BC
    BC.Parent = player




end
game.Players.PlayerAdded:connect(playeradded)
for _, player in pairs(game.Players:GetPlayers()) do
    playeradded(player)
end 

Heres my variables...

local datastore = game:GetService("DataStoreService"):GetDataStore("PlayerData")
local serverstorage = game:GetService("ServerStorage")
local replicatedstorage = game:GetService("ReplicatedStorage")
local debris = game:GetService("Debris")
local maps = serverstorage:WaitForChild("Maps")
local mapholder = game.Workspace:WaitForChild("MapHolder")
local gear = serverstorage:WaitForChild("Gear")
local statustag = replicatedstorage:WaitForChild("Status")
local timertag = replicatedstorage:WaitForChild("TimerTag")
local Winner = replicatedstorage:WaitForChild("Winner")
local resulttag = replicatedstorage:WaitForChild("result")
local event = replicatedstorage:WaitForChild("RemoteEvent")
local firstrun = true

local playerdata = {}

Here's the "Award Win" and "Award Credit" functions

function awardwin(players)
    for _, players in pairs do
        if players.Name == Winner.Value then

            local mydata = playerdata[players.userId]
            if players:FindFirstChild('leaderstats') and mydata then
                mydata.wins = mydata.wins + 1
                local winsvalue = players.leaderstats:FindFirstChild("Wins")
                if winsvalue then
                    winsvalue.Value = mydata.wins
                end
            end
        end
    end
end



function awardcredit(players, credits)
    for _, players in pairs do
        if players.Name == Winner.Value then

            local mydata = playerdata[players.userId]
            if players:FindFirstChild('leaderstats') and mydata then
                mydata.BC = mydata.BC + credits
                local bcvalue = players:FindFirstChild("BlitsCreditz")
                if bcvalue then
                    bcvalue.Value = mydata.BC
                end
            end
        end
    end
end

Some more datastore stuff...

function permsave(player)
    if player then
        local mydata = playerdata[player.userId]
        if mydata then
            datastore:SetAsync(player.userId, mydata)
        end
    end
end

game.Players.PlayerRemoving:connect(function(player)
    if player then
        permsave(player)
        playerdata[player.userId] = nil
    end
end)

game.OnClose = function()
    for i, v in pairs(playerdata) do
        datastore:SetAsync(i, v)
    end
end

Finally, here's when those functions are called...

for _, player in pairs(contestants) do
    if player and player.Character then
        local humanoid = player.Character:FindFirstChild("Humanoid")
        local matchtag = player:FindFirstChild("MatchTag")
        if matchtag and #activecontestants == 1 then
            Winner.Value = player.Name
            resulttag.Value = "Winner"
            awardcredit(Winner.Value, 4)
            awardwin(player)
        end

That's it! Sorry that that was a lot lol. I didn't wanna post the whole 300 line code, so I tried to break it up. Also, using the DataStores a gui is supposed to reflect the amount of BlitzCreditz a player has, but I assumed it wasn't working because the Datastores weren't working properly.

Thanks for all your help!