Error with DataStore GetAsync is not a valid member of DataStoreService "DataStoreService"

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1

I keep getting an error:

GetAsync is not a valid member of DataStoreService “DataStoreService”

I have no clue on how to fix this if somebody could help it would be appreciated.

    local DataStoreService = game:GetService("DataStoreService")

    local BanDataStore = DataStoreService:GetAsync("BanDataStore")

    game.Players.PlayerAdded:Connect(function(player)
    	local banned = Instance.new("BoolValue", player)
    	banned.Name = "banned"
	
	local playerUserId = player.UserId
	
	local bob
	local success, errormessage = pcall(function()
		bob = BanDataStore:GetAsync(playerUserId)
	end)
	
	if bob == true then
		game.Players[player.Name].banned.Value = true
	else
		game.Players[player.Name].banned.Value = false
	end
end)
2

Switch it to :GetDataStore("BanDataStore").