private async void Current_ContractActivated(object sender, IActivatedEventArgs e)
{
if (e is IWebAuthenticationBrokerContinuationEventArgs)
{
AuthenticationWindows authenticationForWindows = AuthenticationWindows.Current as AuthenticationWindows;
if (authenticationForWindows != null)
{
await authenticationForWindows.ContinueAcquireToken(e as IWebAuthenticationBrokerContinuationEventArgs);
}
}
}
