MafiaTelegramBot/MafiaTelegramBot/Models/Commands/CreateGameCommand.cs

using System.Threading.Tasks;
using MafiaTelegramBot.DataBase;
using MafiaTelegramBot.Resources;
using Telegram.Bot.Types;

namespace MafiaTelegramBot.Models.Commands
{
    public class CreateGameCommand : Command
    {
        protected override string Name => keyboard.create_game;

        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, 
                Keyboards.RoomTypeKeyboard(UserId, Callback.MakePrivateRoom, Callback.MakePublicRoom));
        }
    }
}