Azure Mobile Service Authentication - App.MobileService does not exist

Question

I have a Windows 8 Store Application and I want to add Azure Authentication to it. I have followed the example in the MSDN page. However, the following line is giving me issues:

MobileServiceUser loginResult = await App.MobileService.LoginAsync(result.Session.AuthenticationToken);

The error is: App does not contain a definition for MobileService. When does an instance of MobileService get added to the App class?

I have added references to the Microsoft.Live and Azure Mobile Services libraries. Here is the entire Authenticate function:

private async System.Threading.Tasks.Task Authenticate()
        {
        LiveAuthClient liveIdClient = new LiveAuthClient("<< INSERT REDIRECT DOMAIN HERE >>");


        while (session == null)
        {
            // Force a logout to make it easier to test with multiple Microsoft Accounts
            if (liveIdClient.CanLogout)
                liveIdClient.Logout();


            LiveLoginResult result = await liveIdClient.LoginAsync(new[] { "wl.basic" });
            if (result.Status == LiveConnectSessionStatus.Connected)
            {
                session = result.Session;
                LiveConnectClient client = new LiveConnectClient(result.Session);
                LiveOperationResult meResult = await client.GetAsync("me");
                MobileServiceUser loginResult = await App.MobileService.LoginAsync(result.Session.AuthenticationToken);

                string title = string.Format("Welcome {0}!", meResult.Result["first_name"]);
                var message = string.Format("You are now logged in - {0}", loginResult.UserId);
                var dialog = new MessageDialog(message, title);
                dialog.Commands.Add(new UICommand("OK"));
                await dialog.ShowAsync();
            }
            else
            {
                session = null;
                var dialog = new MessageDialog("You must log in.", "Login Required");
                dialog.Commands.Add(new UICommand("OK"));
                await dialog.ShowAsync();
            }
        }
    }

Answer 1

You have to add the class yourself.

On the Azure Mobile Services "Getting Started Page", select "Windows Store", and then "CONNECT AN EXISTING WINDOWS STORE APP" (don't mean to shout, it's literally in all caps on the page like that!).

It will tell you to do the following:

Add "using Microsoft.WindowsAzure.MobileServices;", then copy and paste the following code into your App.xaml.cs file:

public static MobileServiceClient MobileService = new MobileServiceClient(
    "https://[your website].azure-mobile.net/",
    "[your key]"
);