private SportsTradingDbContext GetDbContext()
        {
            var options = new DbContextOptionsBuilder <SportsTradingDbContext>()
                          .UseInMemoryDatabase(Guid.NewGuid().ToString())
                          .Options;

            var db = new SportsTradingDbContext(options);

            return(db);
        }
 public SportsService(SportsTradingDbContext db)
 {
     this.db = db;
 }