How do I use os.time on daily rewards?

Help and Feedback Scripting Support
#1

Hello, I’m trying to make a daily rewards system that gives coins to the player if he has joined the group once every 12 hours, but I don’t know how to use os.time, can someone help?
I’m trying to make it so if the player leaves it will still have to wait 12 hours, because now, if a player leaves the game and joins back he can get 2 group rewards without having to wait 12 hours.

Code:

local part = script.Parent.Parent.MeshPart

local GroupID = 10919067

local GroupReward = 500

local Timer = 40000

local CanGet = true

local function onTouch(otherPart)
           local humanoid = otherPart.Parent:FindFirstChild("Humanoid")
           if humanoid then
                   local player = game.Players:FindFirstChild(otherPart.Parent.Name)
                   if player and CanGet then
                          CanGet = false
                          if player:IsInGroup(GroupID) then
                                player.leaderstats.Taps.Value = player.leaderstats.Taps.Value + GroupReward
                                script.Parent.Part.Thing.Timer.Text = "Come Back in 12 Hours To Claim Your Reward!"
                                wait(Timer)
                                CanGet = true
                          end
                  end
         end
end

part.Touched:Connect(onTouch)
#2

I’m not very familiar with os.time, but you need a datastore that stores the time when the player collected the last reward, then check how much time has passed since the player collected the reward.