add send sticker functional

MafiaTelegramBot/Models/Bot.cs

@@ -90,6 +90,11 @@ namespace MafiaTelegramBot.Models
                 
             };
         }
+
+        public static async Task<Message> SendStickerWithoutPackAsync(long chatId, string url)
+        {
+            return await Get().SendStickerAsync(chatId: chatId, sticker: url);
+        }
         
         public static async Task<Message> SendWithMarkdown2(long chatId, string message, IReplyMarkup replyMarkup = null)
         {

MafiaTelegramBot/Models/Commands/CreateGameCommand.cs

@@ -12,6 +12,7 @@ namespace MafiaTelegramBot.Models.Commands
         protected override async Task<Message> Execute(Update update)
         {
             var user = await UserDao.GetUserById(UserId);
+            await Bot.SendStickerWithoutPackAsync(ChatId, "https://github.com/TelegramBots/book/raw/master/src/docs/sticker-fred.webp");
             if (user.GetRoomKey() != "")
                 return await Bot.SendWithMarkdown2(ChatId, strings.user_already_in_game);
             return await Bot.SendWithMarkdown2(ChatId, strings.choose_type_room,