Private GUI (Whitelist)

--[[
 || 📜 AUTHOR: @4zx16 || PRIVATE GUI (WHITELIST)
]]
local ServerAction = {
    ["F"] = true -- make sure this is set to true or it will not work!
}
--[[
 || 📜 Whitelisted Usernames (Not Recommended)
]]
local StoredData = {""} -- any amount of people can be on the list
local StoredGUI = game:GetService("ReplicatedStorage").Name -- the name of ur gui use ["gui name"] if spaced.

game.Players.PlayerAdded:Connect(function(JoinAction)
    local function SendData()
        StoredGUI:Clone().Parent = JoinAction:WaitForChild("PlayerGui")
    end
    if ServerAction.F == true then
        -- Was enabled via Studio
        for _, Yes in pairs(StoredData) do
            if JoinAction.Name == Yes then
                SendData()
                -- Stops Here
            end
        end
    end
end)
--[[
 || 📜 Whitelisted UserIds (Recommended)
]]
local StoredData_IDs = {""}  -- any amount of people can be on the list (PLAYER IDs ONLY)

game.Players.PlayerAdded:Connect(function(JoinAction)
    local function SendData() -- Sends GUI to the client
        StoredGUI:Clone().Parent = JoinAction:WaitForChild("PlayerGui")
    end
    if ServerAction.F == true then
        -- Was enabled via Studio
        for _, Yes in pairs(StoredData_IDs) do
            if JoinAction.UserId == Yes then
                SendData() -- Sends GUI to the client
                -- Stops Here
            end
        end
    end
end)