How to connect PlayerStatsManager with Leaderboards (Nil Value Error)? [closed]

I'm new to Lua scripting and DataStorage. I have the PlayerStatsManager Script as Shown (Stored in game.ServerStorage) (I have also seen similar questions to mine with little/no responses)

-- Setup table that we will return to scripts that require the ModuleScript.
local PlayerStatManager = {}

-- Create variable for the DataStore.
local DataStoreService = game:GetService('DataStoreService')
local playerData = DataStoreService:GetDataStore('PlayerData')

-- Create variable to configure how often the game autosaves the player data.
local AUTOSAVE_INTERVAL = 60

-- Number of times we can retry accessing a DataStore before we give up and create
-- an error.
local DATASTORE_RETRIES = 3

-- Table to hold all of the player information for the current session.
local sessionData = {}

-- Function the other scripts in our game can call to change a player's stats. This
-- function is stored in the returned table so external scripts can use it.
function PlayerStatManager:ChangeStat(player, statName, childStat, changeValue)
    sessionData[player][statName][childStat] = sessionData[player][statName][childStat] + changeValue
end

function PlayerStatManager:SetStat(player, statName, childStat, newValue)
    sessionData[player][statName][childStat] = newValue
end

function PlayerStatManager:GetData(player,statName,childStat)
    return (sessionData[player][statName][childStat])
end

-- Function to retry the passed in function several times. If the passed in function
-- is unable to be run then this function returns false and creates an error.
local function dataStoreRetry(dataStoreFunction)
    local tries = 0 
    local success = true
    local data = nil
    repeat
        tries = tries + 1
        success = pcall(function() data = dataStoreFunction() end)
        if not success then wait(1) end
    until tries == DATASTORE_RETRIES or success
    if not success then
        error('Could not access DataStore! Warn players that their data might not get saved!')
    end
    return success, data
end

-- Function to retrieve player's data from the DataStore.
local function getPlayerData(player)
    return dataStoreRetry(function()
        return playerData:GetAsync(player.UserId)
    end)
end

-- Function to save player's data to the DataStore.
local function savePlayerData(player)
    if sessionData[player] then
        return dataStoreRetry(function()
            return playerData:SetAsync(player.UserId, sessionData[player])
        end)
    end
end

-- Function to add player to the sessionData table. First check if the player has
-- data in the DataStore. If so, we'll use that. If not, we'll add the player to
-- the DataStore.
local function setupPlayerData(player)
    local success, data = getPlayerData(player)
    if not success then
        -- Could not access DataStore, set session data for player to false.
        sessionData[player] = false
    else
        if not data then
            print"what lol"
            -- DataStores are working, but no data for this player
            sessionData[player] = {}
            sessionData[player] = {Coins = 10, Escapes = 0, Vip = false}
            savePlayerData(player)
        else
            -- DataStores are working and we got data for this player
            sessionData[player] = data
        end
    end 
end

-- Function to run in the background to periodically save player's data.
local function autosave()
    while wait(AUTOSAVE_INTERVAL) do
        for player, data in pairs(sessionData) do
            savePlayerData(player)
        end
    end
end

-- Bind setupPlayerData to PlayerAdded to call it when player joins.
game.Players.PlayerAdded:connect(setupPlayerData)

-- Call savePlayerData on PlayerRemoving to save player data when they leave.
-- Also delete the player from the sessionData, as the player isn't in-game anymore.
game.Players.PlayerRemoving:connect(function(player)
    savePlayerData(player)
    sessionData[player] = nil
end)

-- Start running autosave function in the background.
spawn(autosave)

-- Return the PlayerStatManager table to external scripts can access it.
return PlayerStatManager

And I'm trying to call that script inside of my leaderboard script, located in game>Workspace>Main>Stats. This is what I have so far, and I'm attempting to reach it by calling Wins.Value = PlayerStatManager:GetData(Player, "Wins", 0)

PlayerStatManager = require(game.ServerStorage.PlayerStatManager)

game.Players.PlayerAdded:connect(function(Player)

    -- Folders
    local Folder = Instance.new("Folder", Player)
    Folder.Name = 'leaderstats'

    local settingFolder = Instance.new("Folder", Player)
    settingFolder.Name = 'PlayerSettings'

    -- Player
    local Playing = Instance.new('BoolValue', Player)
    Playing.Name = 'Playing'
    Playing.Value = false
    local isAFK = Instance.new('BoolValue', Player)
    isAFK.Name = 'isAFK'
    isAFK.Value = false

    -- Leaderboard
    local Escapes = Instance.new('IntValue', Folder)
    Wins.Name = 'Wins'
    Wins.Value = PlayerStatManager:GetData(Player, "Wins", 0)
    print(Wins.Value)

    local Coins = Instance.new('IntValue', Folder)
    Coins.Name = 'Coins'
    Coins.Value = PlayerStatManager:GetData(Player, "Coins", 10)
    print(Coins.Value)

    -- In-game Leaderboard
    local Kills = Instance.new("IntValue", settingFolder)
    Kills.Name = "Kills"
    Kills.Value = 0

end)

I'm new to DataStorage, and keep getting nil value errors. The most recent error reads 18:55:55.154 - ServerStorage.PlayerStatManager:29: attempt to index field '?' (a nil value) I've toggled with this script a little and get different errors, but they all result in this sort of error.

I'm just trying to save and store data right now. Can't get passed this error