Program.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Test.Data;

namespace Test
{
    public class Program
    {
        public static void Main(string[] args)
        {
            // CreateWebHostBuilder(args).Build().Run();

            var host = BuildWebHost(args);

            using (var scope = host.Services.CreateScope())
            {
                var services = scope.ServiceProvider;
                var context = services.GetRequiredService<ApplicationDbContext>();
                context.Database.Migrate();

                var config = host.Services.GetRequiredService<IConfiguration>();

                // Set password with the Secret Manager tool.
                // dotnet user-secrets set SeedUserPW <PW>
                var testuserPw = config["SeedUserPw"];

                try
                {
                    SeedData.Initialize(services, testuserPw).Wait();

                }
                catch (Exception exception)
                {
                    var logger = services.GetRequiredService<ILogger<Program>>();
                    logger.LogError(exception, "An error occurred while creating roles");
                }
            }

            host.Run();
        }

        // public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        //     WebHost.CreateDefaultBuilder(args)
        //         .UseStartup<Startup>();

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .Build();
    }
}