Program.cs

using ProgrammaticFiltering.Data;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using System;

namespace ProgrammaticFiltering
{
    #region snippet
    public class Program
    {
        public static void Main(string[] args)
        {
            var host = CreateHostBuilder(args).Build();

            using (var scope = host.Services.CreateScope())
            {
                var services = scope.ServiceProvider;

                try
                {
                    var context = services.GetRequiredService<ApplicationDbContext>();
                    context.Database.Migrate();

                    // requires using Microsoft.Extensions.Configuration;
                    var config = host.Services.GetRequiredService<IConfiguration>();
                    // Set password with the Secret Manager tool.
                    // dotnet user-secrets set SeedUserPW <pw>

                    var testUserPw = config["SeedUserPW"];

                    SeedData.Initialize(services, testUserPw).Wait();
                }
                catch (Exception ex)
                {
                    var logger = services.GetRequiredService<ILogger<Program>>();
                    logger.LogError(ex, "An error occurred seeding the DB.");
                }
            }

            host.Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }
    #endregion
}