private async Task <DialogTurnResult> SendLinkStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
var card = _uiService.GetLoginCard();
return(await stepContext.PromptAsync(SendOAuthLinkPrompt,
new PromptOptions
{
Prompt = MessageFactory.Attachment(card) as Activity
},
cancellationToken));
}