Example Setup

local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local keyForm = require(path.to.keyForm)

local playerDataStore = keyForm.createStore("Store1", {
    secondsPlayed = 1,
})

local incrementSecondsPlayed = playerDataStore:createTransform(function(data, amount)
    data.secondsPlayed += amount
    return data
end)

local keys = {}
Players.PlayerAdded:Connect(function(player)
    local key = playerDataStore:loadKey(`player_{player.UserId}`)
    keys[player] = key

    local successfulLock = key:lockAsync()
    if successfulLock then
        -- Every 1 second, increment the seconds played by 1
        while player:IsDescendantOf(game) do
            incrementSecondsPlayed(key, 5)
            task.wait(1)
        end
    else
        player:Kick("session locked")
    end
end)

Players.PlayerRemoving:Connect(function(player)
    if keys[player] then
        keys[player]:unlock()
        keys[player]:remove()
    end
end)