/// <summary>
/// Log out of the system.
/// </summary>
/// <returns></returns>
public async Task LogoutAsync()
{
if (Client.CurrentUser == null || Client.CurrentUser.MobileServiceAuthenticationToken == null)
{
return;
}
// Log out of the identity provider (if required)
// review: https://github.com/adrianhall/develop-mobile-apps-with-csharp-and-azure/blob/master/Chapter3/TaskList/TaskList/Services/AzureCloudService.cs
// Invalidate the token on the mobile backend (// Remove the token from the token store)
var authUri = new Uri($"{Client.MobileAppUri}/.auth/logout");
using (var httpClient = new HttpClient())
{
httpClient.DefaultRequestHeaders.Add("X-ZUMO-AUTH", Client.CurrentUser.MobileServiceAuthenticationToken);
await httpClient.GetAsync(authUri);
}
// Remove the token from the cache
LoginProvider.RemoveTokenFromSecureStore();
Settings.AccessToken = "";
Settings.ResetAll();
//Purge items from local storage
var force = true;
await sharingSpaceTable.PurgeAsync("PurgeQuery", null, force, CancellationToken.None);
// Remove the token from the MobileServiceClient
await Client.LogoutAsync();
}
