private async Task MessageReceivedAsync(IDialogContext context, IAwaitable <object> result)
{
var activity = await result as IMessageActivity;
var playerName = Utils.SanitizeText(activity.Text);
if (await LeaderboardService.IsNewPlayer(playerName))
{
context.ConversationData.SetValue(Constants.PLAYER_NAME_KEY, playerName);
await context.PostAsync($"Let's play and earn some coins!");
await context.Forward(new WhoIsDialog(), AfterWhoIsDialog, activity);
}
else
{
await context.PostAsync("This address has already been used.");
context.Wait(MessageReceivedAsync);
}
}