How could i add a click multiplyier when a player rebirth's?

Hi, i am a fairly new Roblox scripting and i have been having some difficulty figuring out how to make a click multiplier when a player rebirths while also setting their clicks to zero and adding some coins to the players leaderstats. Here are the scripts:

Leaderstats:

local datastore = game:GetService("DataStoreService")
local data1 = datastore:GetDataStore("TapsData112")
local data5 = datastore:GetDataStore("RebirthsData112")
local data6 = datastore:GetDataStore("GemsData112")
local data8 = datastore:GetDataStore("GemiData112")


game.Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder", player)
	leaderstats.Name = "leaderstats"
	local Clicks = Instance.new("IntValue", leaderstats)
	Clicks.Name = "Clicks"
	local Rebirths = Instance.new("IntValue", leaderstats)
	Rebirths.Name = "Rebirths"
	local Coins = Instance.new("IntValue", leaderstats)
	Coins.Name = "Coins"
	local Gemi = Instance.new("IntValue", leaderstats)
	Gemi.Name = "Eggs"


	
	
	
	Clicks.Value = data1:GetAsync(player.UserId) or 0
	data1:SetAsync(player.UserId, Clicks.Value)
	
	Rebirths.Value = data5:GetAsync(player.UserId) or 0
	data5:SetAsync(player.UserId, Rebirths.Value)
	
	Coins.Value = data6:GetAsync(player.UserId) or 0
	data6:SetAsync(player.UserId, Coins.Value)

	Gemi.Value = data8:GetAsync(player.UserId) or 0
	data8:SetAsync(player.UserId, Gemi.Value)
	

	

	
	
	game.Players.PlayerRemoving:Connect(function()
		data1:SetAsync(player.UserId, Clicks.Value)

		data5:SetAsync(player.UserId, Rebirths.Value)
		
		data6:SetAsync(player.UserId, Coins.Value)

		data8:SetAsync(player.UserId, Gemi.Value)
	end)
end)

Buy RebirthScript

local suff = {'','K','M','B','T','qd','Qn','sx','Sp','O','N','de','Ud','DD','tdD','qdD','QnD','sxD','SpD','OcD','NvD','Vgn','UVg','DVg','TVg','qtV','QnV','SeV','SPG','OVG','NVG','TGN','UTG','DTG','tsTG','qtTG','QnTG','ssTG','SpTG','OcTG','NoAG','UnAG','DuAG','TeAG','QdAG','QnAG','SxAG','SpAG','OcAG','NvAG','CT','INF'}
local function short(val) for i=1, #suff do if tonumber(val) < 10^(i*3) then return math.floor(val/((10^((i-1)*3))/100))/(100)..suff[i]end end end

local player = script.Parent.Parent.Parent.Parent.Parent.Parent
local leaderstats = player:WaitForChild("leaderstats")
local Clicks = leaderstats:WaitForChild("Clicks")
local Rebirths = leaderstats:WaitForChild("Rebirths")
local Gems = leaderstats:WaitForChild("Coins")


local MS = require(game.ServerStorage.Rebirths)

script.Parent.Buy.MouseButton1Click:Connect(function()
	if Clicks.Value >= MS[script.Parent.Name]["C"]*(Rebirths.Value+1) then
		Clicks.Value = 0
		Rebirths.Value = Rebirths.Value + MS[script.Parent.Name]["R"]
		Gems.Value = Gems.Value + MS[tostring(script.Parent.Name)]["R"]*10 * (leaderstats.Coins.Value)
	end
end)

while wait() do
	script.Parent.Title.Text = short(MS[script.Parent.Name]["R"]) .. " Rebirths for " .. short(MS[script.Parent.Name]["C"]*(Rebirths.Value+1)) .. " Clicks"
end

ClickScript (Event fired)

local debounce = false

function getMultiplier(Player, multiplierName)
	local Multi = 0
	for i,v in pairs(Player.Pets:GetChildren()) do
		if v.Equipped.Value == true then
			Multi = Multi + v[multiplierName].Value
		end
	end
	return Multi
end


script.GetClick.OnServerEvent:Connect(function(plr)
	if not debounce then
		debounce = true
		local leaderstats = plr:WaitForChild("leaderstats")
		leaderstats.Clicks.Value = leaderstats.Clicks.Value + 2 + 2 * getMultiplier(plr, "Multiplier1", "Multiplier3")
		wait(0.1)
		debounce = false
	end
end)

Im sorry if this is too much, but if someone can help me, it would be very much appreciated!

You could add an argument called rebirths to the function getMultiplier and when you call the function just add the amount of rebirths the player has by adding Rebirths.Value as the rebirths argument and then change the Multi to rebirths. Like this:

	function getMultiplier(Player, multiplierName, rebirths)
	    local Multi = rebirths
	    for i,v in pairs(Player.Pets:GetChildren()) do
	        if v.Equipped.Value == true then
	            Multi = Multi + v[multiplierName].Value
	        end
	    end
	    return Multi
	end

Call the function like this getMultiplier(plr, "Multiplier1", "Multiplier3", Rebirths.Value). I dont know why is there one argument multiplierName and you gave it two arguments.

I found where to put the script, but it doesn't work, it says this:

W001: Unknown global "Rebirths"

This is my script now:

local debounce = false

function getMultiplier(Player, multiplierName, rebirths)
	local Multi = rebirths
	for i,v in pairs(Player.Pets:GetChildren()) do
		if v.Equipped.Value == true then
			Multi = Multi + v[multiplierName].Value
		end
	end
	return Multi
end


script.GetClick.OnServerEvent:Connect(function(plr)
	if not debounce then
		debounce = true
		local leaderstats = plr:WaitForChild("leaderstats")
		leaderstats.Clicks.Value = leaderstats.Clicks.Value + 2 + 2 * getMultiplier(plr, "Multiplier1", Rebirths.Value)
		wait(0.1)
		debounce = false
	end
end)

It would be amazing if you could continue helping me!