The Player Point Script I have is not working, am I missing something on that script?

I've been doing researches on my own, yet the only thing Roblox's shows me is a Player Point Script when you JOIN a game

That's the script I added in my place. (Kill a required amount of players to get PP)

PointsService = game:GetService("PointsService")
Stat = "KOs" --Change to the stats name
Needed = 5 --Change to the amount needed to get the playerpoints.
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,10)
                end
        end)
end)

(I did added the linked Leaderboard, and a linked sword.)

And also I did installed the script How many PP are available to get.

local service = game:GetService("PointsService") 

game.Players.PlayerAdded:connect(function(player) 
player:WaitForDataReady() 
service:AwardPoints(500, service:GetAwardablePoints()) 
end) 

Yet it's still not working, and I tried to find some help on YouTube and almost everywhere I could look, I still come with nothing.

Does anyone know what I'm doing wrong?

1. You need to make sure your game has player points. How do you get them? Here's that answer: Is there a player points script?
2. Script one works fine.
3. 500 in your second script represents the userId, so you're sending all you awardable points to user with the Id of 500. It should look like:

service:AwardPoints(player.userId, 500)