Data Store... sort of not working with module script?

Hi everyone!

So I was implementing data store into my game to save the number of survivals and coins a player has after they exit (I'm new to data store). I used a couple examples I found to make a data store like this and I made a module script any script can access. So I use the module script in 2 other scripts: 1 in the server script service, which sets up the leader board and the data store, and another script which changes the number of coins and survivals (both on the leaderboard and the data store) when its parent (a part) is touched by a player. Here are the scripts:

ModuleScript named "Datastore"

local DataStoreModule = {}

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

function DataStoreModule.onPlayerJoin(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

    local Survivals = Instance.new("IntValue")
    Survivals.Name = "Survivals"
    Survivals.Parent = leaderstats

    local Coins = Instance.new("IntValue")
    Coins.Name = "Coins"
    Coins.Parent = leaderstats

    local data
    local data2
    local success, errormessage = pcall(function()
        data = playerdata:GetAsync(player.UserId .. "-Survivals")
        data2 = playerdata:GetAsync(player.UserId .. "-Coins")
    end)
    if success then
        Survivals.Value = data
        Coins.Value = data2
        print("Player ID " .. player.UserId ..": Data fully created!")
    else
        warn("Player ID " .. player.UserId .. ": There was an error while making data (" .. errormessage .. ")")
    end
end

function DataStoreModule.SaveData(player)
    local success, errormessage  = pcall(function()
        playerdata:SetAsync(player.UserId .. "-Survivals", player.leaderstats.Survivals.Value)
        playerdata:SetAsync(player.UserId .. "-Coins", player.leaderstats.Coins.Value)
    end)
    if success then
        print("Player ID " .. player.UserId .. ": Data fully saved!")
    else
        warn("Player ID " .. player.UserId .. ": There was an error while saving data (" .. errormessage .. ")")
    end
end

return DataStoreModule

Leaderboard script

DataStore = require(game.Workspace.Datastore)

game.Players.PlayerAdded:Connect(DataStore.onPlayerJoin)

game.Players.PlayerRemoving:Connect(DataStore.SaveData)

Script for when the part is hit by the player ("HitScript")

local Players = game:GetService("Players")
local DataStore = require(game.Workspace.Datastore)
Main = require(game.Workspace.Main)
Survivors = Main.Survivors
InList = false
script.Parent.Touched:Connect(function(h)
    if h.Parent:FindFirstChild("Humanoid") then
        h.Parent.HumanoidRootPart.CFrame = game.Workspace.Lobby.SpawnLocation.CFrame + Vector3.new(0,7,0)
        for i = 1, #Survivors do
            local Survivor = Survivors[i]
            if Survivor == h.Parent.Name then
                InList = true
                break
            end
        end
        if InList == false then
            table.insert(Survivors, #Survivors + 1, h.Parent.Name)
            local player = Players:GetPlayerFromCharacter(h.Parent)
            if not player then return end
            game.ReplicatedStorage.WinPadHit:FireClient(player)
            DataStore.SaveData(player)
        end
    end
end)

For some reason, the data isnt saved when the hit script runs (I touch the part), but when I mannually change the survivals and coins values using the dev console, data store works fine. The prints also work when the hit script runs, but no change happens.

Any help is appreciated!