Methods

Method	Argument (Set)
Dropdown:Button(<string>)	string
Dropdown:Remove(<string>)	string

Example

Button

local Players = game:GetService("Players")

for _,v in ipairs(Players:GetPlayers()) do
    Dropdown:Button(v.Name)
end

Players.PlayerAdded:Connect(function(Player)
    Dropdown:Button(Player.Name)
end)

Remove

local Players = game:GetService("Players")

Players.PlayerRemoving:Connect(function(Player)
    Dropdown:Remove(Player.Name)
end)

You will be warned if the button does not exist.