How do I award points when somebody gets a KO?

I need Help with a script that awards 15 points every KO. I already have points in the server but I don't know how to award them. Please Help!

My Code:

PointsService = game:GetService("PointsService")
Stat = "KOs"
Needed = 1 
game.Players.PlayerAdded:connect(function(p)
        repeat wait() until p:FindFirstChild("leaderstats") ~= nil
        print("Found \"leaderstats\" object!")
        repeat wait() until p.leaderstats:findFirstChild(Stat) ~= nil
        print("Found "..Stat.." object!")
        p.leaderstats[Stat].Changed:connect(function(prop)
                print("Value changed!")
                if prop >= Needed then
                        game:GetService("PointsService"):AwardPoints(p.userId,15) --Change 1 to the amount of points to be awarded each time
                end
        end)
end)