How to get users mouse without Local script?[Solved]

I have a animation system and would like to get the users mouse. Only problem is, I cant make the script a local script. This is what I have so far, but it wont work.

a script inserts a string value in each player with their name in the part. Then I used game.Players:FindFirstChild(''..StringValue.Value) to get the player. Now that I had played defined I did player:GetMouse() and it works in studio, just not online. I get a note online saying this "Workspace.(Player).script: attempt to index global 'mouse' (a nil value) "

name= script.Parent.Value
player = game.Players:FindFirstChild(""..namz.Value)
mouse = player:GetMouse()

EDIT: The errors on line 315, ill post that chunk.

mouse.KeyDown:connect(function(key)
    keysDown[key:lower()] = true
end)

mouse.KeyUp:connect(function(key)
    keysDown[key:lower()] = false
end)