private async Task LoadAndShowProfileInfoAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
var tokenState = (TokenState)stepContext.Values["accessToken"];
var currentUser = await GraphApiHelper.GetCurrentUserAsync(tokenState, cancellationToken);
await stepContext.Context.SendActivityAsync($"You are {currentUser.DisplayName}.", cancellationToken : cancellationToken);
}