How will I add A Creator value / tag in my gun script??

so uhhh idk how to add Creator Value / tag in my gun script here si the gun script:

script.Parent.DealDamage.OnServerEvent:Connect(function(player, Target, Damage)
    Target.Humanoid:TakeDamage(Damage)
    if Target.Humanoid.Health == 0 then
--add the Creator Value / Tag
    end
end)

if you know please tell me how beacuse im really new to roblox studio specially scripting Thanks!