IncrementAsync not an int value?

local DataStoreService = game:GetService("DataStoreService")

local deaths = DataStoreService:GetDataStore("PlayerDeaths")


local function onPlayerJoin(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player


    local deaths = Instance.new("IntValue")
    deaths.Name = "Accidents"
    deaths.Parent = leaderstats


    player.CharacterAdded:Connect(function(char)
        -- detect humanoid died.
        char.Humanoid.Died:Connect(function()
            print("e")
            local success, newDeath = pcall(function()
                print("ee")
                return deaths:IncrementAsync(player.UserId, 1)

            end)
            print(newDeath)
            if success then
                deaths.Value = newDeath-- add 1 value to values
                print(newDeath)
            end
        end)
    end)
end



game.Players.PlayerAdded:Connect(onPlayerJoin)

e and ee print the first newDeath results in "IncrementAsync is not a valid member of IntValue"