Can someone give me a better understanding of Saving Player Data using tables?

Hello, I want to use the following code to save a table.

-- Set up table to return to any script that requires this module script
local PlayerStatManager = {}

local DataStoreService = game:GetService("DataStoreService")
local playerData = DataStoreService:GetDataStore("PlayerData")

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

local AUTOSAVE_INTERVAL = 60

-- Function that other scripts can call to change a player's stats
function PlayerStatManager:ChangeStat(player, statName, value)
    assert(typeof(sessionData[playerUserId][statName]) == typeof(value), "ChangeStat error: types do not match")
    local playerUserId = "Player_" .. player.UserId
    if typeof(sessionData[playerUserId][statName]) == "number" then
        sessionData[playerUserId][statName] = sessionData[playerUserId][statName] + value
    else
        sessionData[playerUserId][statName] = value
    end
end

-- Function to add player to the 'sessionData' table
local function setupPlayerData(player)
    local playerUserId = "Player_" .. player.UserId
    local success, data = pcall(function()
        return playerData:GetAsync(playerUserId)
    end)
    if success then
        if data then
            -- Data exists for this player
            sessionData[playerUserId] = data
        else
            -- Data store is working, but no current data for this player
            sessionData[playerUserId] = {Money=0, Codes=[]}
        end
    else
        warn("Cannot access data store for player!")
    end
end

-- Function to save player's data
local function savePlayerData(playerUserId)
    if sessionData[playerUserId] then
        local success, err = pcall(function()
            playerData:SetAsync(playerUserId, sessionData[playerUserId])
        end)
        if not success then
            warn("Cannot save data for player!")
        end
    end
end

-- Function to save player data on exit
local function saveOnExit(player)
    local playerUserId = "Player_" .. player.UserId
    savePlayerData(playerUserId)
end

-- Function to periodically save player data
local function autoSave()
    while wait(AUTOSAVE_INTERVAL) do
        for playerUserId, data in pairs(sessionData) do
            savePlayerData(playerUserId)
        end
    end
end

-- Start running 'autoSave()' function in the background
spawn(autoSave)

-- Connect 'setupPlayerData()' function to 'PlayerAdded' event
game.Players.PlayerAdded:Connect(setupPlayerData)

-- Connect 'saveOnExit()' function to 'PlayerRemoving' event
game.Players.PlayerRemoving:Connect(saveOnExit)

return PlayerStatManager

I have search everywhere trying to find out how to use it. The following link tells me how to write it but doesnt tell me how to read data from it. https://developer.roblox.com/articles/Saving-Player-Data Just say i want to create a intvalue how do i read what the intvalue says from the following script. If you can explain it that would be much appreciated or give links to where i can i have searched and nothing to be found. Thanks.