/// <summary>
/// Tries to check if the user is logged in without prompting to login.
/// </summary>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
public async Task TrySilentSignInAsync()
{
var account = (await Client.GetAccountsAsync()).FirstOrDefault();
if (account == null)
{
// No accounts
State = ProviderState.SignedOut;
}
else
{
try
{
// Try and sign-in // TODO: can we use empty scopes?
var result = await Client.AcquireTokenSilent(new string[] { string.Empty }, account).ExecuteAsync();
if (!string.IsNullOrWhiteSpace(result.AccessToken))
{
State = ProviderState.SignedIn;
}
else
{
State = ProviderState.SignedOut;
}
}
catch (MsalUiRequiredException)
{
await LoginAsync();
}
catch (Exception)
{
State = ProviderState.SignedOut;
}
}
}
public virtual async Task <AuthenticationResult> AcquireTokenSilentAsync(string[] scopes, IAccount account, bool async, CancellationToken cancellationToken)
{
await EnsureInitializedAsync(async).ConfigureAwait(false);
return(await Client.AcquireTokenSilent(scopes, account).ExecuteAsync(async, cancellationToken).ConfigureAwait(false));
}