"Script:14: attempt to index nil with 'Target'" How do I fix this?

I'm trying to make a gun right now. When ever i click it just leaves me with this error: attempt to index nil with 'Target'"

local db = false --debounce

script.Parent.Equipped:Connect(function() --when its equipped

    local player = game.Players:FindFirstChild( script.Parent.Parent.Name) --player
local character = player.Character --players character
local Handle = script.Parent.Handle --the tools handle
        local Fire = script.Parent.Particles.FirePart.Fire --the particle for when you fire the gun

script.Parent.Activated:Connect(function() --when clicked
    if db == false then --debounce
        db = true
local mouse = player:GetMouse()
        print(mouse.Target.Name) --error

                                --still writing some code here

        wait(1)
        db = false --setting the debounce back to false after 1 second
    end
end)
end)