DatatStore Failed Fetching Stats, why?

Hello! I am creating a currency system used in my Club Game, Club Void, and I was wondering as to why I am getting the failure to fetch print on my output? The error it brings is "GetASync is NOT a valid member of Global Data"

Here is an image of the failed output: https://gyazo.com/d23d2e045cc79e143a626e9c4f4d6033 Here is my code:

local dss = game:GetService("DataStoreService")
local mydatastore = dss:GetDataStore("mydatastore")

game.Players.PlayerAdded:Connect(function(player)
    local leaderstats = Instance.new("Folder")
    local vcash = Instance.new("IntValue")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player
    vcash.Name = "VCash"
    vcash.Parent = leaderstats

    local data
    local success, errormessage = pcall(function()
        data = mydatastore:GetASync(player.UserId.."-VCash")
    end)
    if success then
        vcash.Value = data
    else
        print("Error Fetching Data!")
        warn(errormessage)
    end
end)

game.Players.PlayerRemoving:Connect(function(player)
    local success,  errormessage = pcall(function()
        mydatastore:SetASync(player.UserId.."-VCash",player.leaderstats.vcash.Value)
    end)
    if success then
        print("Stats Saved!")
    else
        print ("Saving Failed!")
        warn(errormessage)
    end
end)