How can i get the player when using :FireClient?

Hello, zmonds!

On the event, you recive a parameter, the player

I found this scripts on roblox official wiki

-- LocalScript
 
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local createPartEvent = ReplicatedStorage:WaitForChild("CreatePartEvent")
 
createPartEvent:FireServer()

. . .

-- Script
 
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local createPartEvent = Instance.new("RemoteEvent", ReplicatedStorage)
createPartEvent.Name = "CreatePartEvent"
 
local function onCreatePartFired(player)
	print(player.Name, "wants to create a part")
	local newPart = Instance.new("Part")
	newPart.Position = Vector3.new(0, 20, 0)
	newPart.Parent = game.Workspace
end
 
createPartEvent.OnServerEvent:Connect(onCreatePartFired)

Good Luck with your games