async void Authenticate(string policy) { string authority = "https://login.microsoftonline.com/ryanngbeta.onmicrosoft.com"; string clientId = "9b7f9dee-c454-4101-ad1d-a9eb6595a6ec"; IAuthClient authClient = new AuthClient(authority, clientId); authClient.WebViewClient = new IosWebViewClient(() => this); //request string prefillEmail = "";//could be NULL AuthenticationResult authResult = await authClient.AcquireTokenAsync(policy, () => { //POST request Access Token -> started SVProgressHUDBinding.SVProgressHUD.Show(); }, () => { //POST request Access Token -> finished SVProgressHUDBinding.SVProgressHUD.Dismiss(); }, prefillEmail); switch (authResult.ResultType) { case AuthResultType.Success: new UIAlertView("Success", authResult.Token.IdToken.Substring(0, 50) + "...", null, "Ok").Show(); break; case AuthResultType.Failed: new UIAlertView("Failed", authResult.ErrorMessage, null, "Ok").Show(); break; default: break; } }