How do I fix Players:GetUserIdFromName() failed because the user does not exist?

I just recently really tried to start scripting and I've run into a problem with a global stats leaderboard. The problem is that I made a local server and tried to use the leaderboard with them and there user Id's are negative numbers (eg: -1 -2 -3) which the script can't use. I've seen some other people with this problem but I'm still unsure of how to fix it. My script is below if you want to look it over. Does anyone have an in-depth fix for this problem?

 local DataStoreService = game:GetService("DataStoreService")
local WinsLeaderboard = DataStoreService:GetOrderedDataStore("WinsLeaderboard")

local function updateLeaderboard()
        local success, errorMessage = pcall (function()
                local Data = WinsLeaderboard:GetSortedAsync(false, 5)
                local WinsPage = Data:GetCurrentPage()
                for Rank, data in ipairs(WinsPage) do
			    local userName = game.Players:GetUserIdFromNameAsync(tonumber(data.key))
			           local Name = userName
                       local Wins = data.value
			           local isOnLeaderboard = false
                       for i, v in pairs(game.Workspace.GlobalLeaderboard.LeaderboardGUI.Holder:GetChildren()) do
                             if v.Player.Text == Name then
                                  isOnLeaderboard = true
                                  break
                           end
                    end

                     if Wins and isOnLeaderboard == false then
                            local newLbFrame = game.ReplicatedStorage:WaitForChild("LeaderboardFrame"):Clone()
                            newLbFrame.Player.Text = Name
                            newLbFrame.Wins.Text = Wins 
                            newLbFrame.Rank.Text = "#"..Rank
                            newLbFrame.Position = UDim2.new(0, 0, newLbFrame.Position.Y.Scale + (.08 * #game.Workspace.GlobalLeaderboard.LeaderboardGUI.Holder:GetChildren()), 0)
                            newLbFrame.Parent = game.Workspace.GlobalLeaderboard.LeaderboardGUI.Holder
                     end
              end
      end)

      if not success then
            print(errorMessage)
      end
end

while true do

        for _, player in pairs(game.Players:GetPlayers()) do
              WinsLeaderboard:SetAsync(player.UserId, player.leaderstats.Wins.Value)
        end

        for _, frame in pairs (game.Workspace.GlobalLeaderboard.LeaderboardGUI.Holder:GetChildren()) do
              frame:Destroy()
        end

        updateLeaderboard()
        print("Updated!")

        wait(10)
end

If I understand correctly you're trying to get the player's name, using its UserId.. However you are using the GetUserIdFromNameAsync() function. That gives you the UserId from the player's name, which is the opposite. For example:

local userID = game.Players:GetUserIdFromNameAsync(playerName)

This would be the correct use of that function. What you need is:

local username = game.Players:GetNameFromUserIdAsync(tonumber(data.key))

I changed

local userName = game.Players:GetUserIdFromNameAsync(tonumber(data.key))

to

local username = game.Players:GetNameFromUserIdAsync(tonumber(data.key))