How do I set this variable to a leaderstat??

So I want the variable "Upgrades" to be the value of the leaderstats I have name "Upgrades" How would I do that?

local Upgrades = 1
game.ReplicatedStorage.anything.OnServerEvent:Connect(function(player)
	player.leaderstats.Blocks.Value = player.leaderstats.Blocks.Value + Upgrades
end)

You can create an attribute.

game.ReplicatedStorage.anything.OnServerEvent:Connect(function(player)
	local leaderstats = player:WaitForChild("leaderstats")
	local Upgrades = leaderstats:GetAttribute("Upgrades")
	if not Upgrades then -- if the attribute wasn't created yet
		leaderstats:SetAttribute("Upgrades", 1) -- creates the attribute
		Upgrades = 1 -- defines Upgrades as 1 (default)
	end
	
	leaderstats:WaitForChild("Blocks").Value += Upgrades
end)