stupid kill gui script

local Fluent = loadstring(game:HttpGet("https://github.com/dawid-scripts/Fluent/releases/latest/download/main.lua"))() -- <3
local damage = 1
local user = ""

local Window = Fluent:CreateWindow({
    Title = "Kill GUI",
    SubTitle = "by catlover326",
    TabWidth = 160,
    Size = UDim2.fromOffset(580, 460),
    Acrylic = true,
    Theme = "Dark",
    MinimizeKey = Enum.KeyCode.LeftControl
})

local Tabs = {
    Main = Window:AddTab({ Title = "Main", Icon = "" }),
}

local Input = Tabs.Main:AddInput("Input", {
    Title = "Input",
    Default = "",
    Placeholder = "Username here.. (Full username)",
    Numeric = false,
    Finished = true,
    Callback = function(Value)
        user = Value
    end
})

Input:OnChanged(function()
    user = Input.Value
end)

local Slider = Tabs.Main:AddSlider("Slider", {
    Title = "Damage",
    Description = "How much damage the player will take",
    Default = 50,
    Min = 1,
    Max = 100,
    Rounding = 1,
    Callback = function(Value)
        damage = Value
    end
})

local function damagePlayer(targetUser, dmg)
    local player = game:GetService("Players"):FindFirstChild(targetUser)
    if player and player.Character and player.Character:FindFirstChild("Humanoid") then
        local args = {
            [1] = workspace:FindFirstChild(player.Name),
            [2] = player.Character.Humanoid,
            [3] = tonumber(dmg)
        }

        game:GetService("ReplicatedStorage"):WaitForChild("Guns"):WaitForChild("Damage"):FireServer(unpack(args))

    end
end

local function damageAllPlayers(dmg)
    for _, player in pairs(game:GetService("Players"):GetPlayers()) do
        if player.Character and player.Character:FindFirstChild("Humanoid") then
            damagePlayer(player.Name, dmg)
        end
    end
end

Tabs.Main:AddButton({
    Title = "Damage Player",
    Description = "Damages/Kills player you put (Put valid username btw)",
    Callback = function()
        damagePlayer(user, damage)
    end
})

Tabs.Main:AddButton({
    Title = "Damage All",
    Description = "Damages/Kills all players in the game",
    Callback = function()
        damageAllPlayers(damage)
    end
})

Tabs.Main:AddButton({
    Title = "Damage Others",
    Description = "Damages/Kills others",
    Callback = function()
        local localPlayer = game:GetService("Players").LocalPlayer
        for _, player in pairs(game:GetService("Players"):GetPlayers()) do
            if player ~= localPlayer and player.Character and player.Character:FindFirstChild("Humanoid") then
                damagePlayer(player.Name, damage)
            end
        end
    end
})