public UpgradesService(IClickerDatabaseSettings settings)
        {
            var client   = new MongoClient(settings.ConnectionString);
            var database = client.GetDatabase(settings.DatabaseName);

            _upgrades = database.GetCollection <Upgrade>(settings.UpgradesCollectionName);
        }
        public StatisticsService(IClickerDatabaseSettings settings)
        {
            var client   = new MongoClient(settings.ConnectionString);
            var database = client.GetDatabase(settings.DatabaseName);

            _stats = database.GetCollection <Statistics>(settings.StatisticsCollectionName);
        }