private static async Task SeedDatabaseAsync()
        {
            Console.Write("Seeding database from file...");

            var vehicles = DataLoader.LoadVehiclesFromExcel();
            await _vehicleRepository.AddVehiclesAsync(vehicles);

            Console.WriteLine($"done.  {vehicles.Count()} vehicles from {vehicles.Select(v => v.Manufacturer).Distinct().Count()} manufacturers added.");
        }