Program.cs

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using System;
using System.Threading.Tasks;
using ZappitBugTracker.Data;
using ZappitBugTracker.Helpers;
using ZappitBugTracker.Models;

namespace ZappitBugTracker
{
    public class Program
    {

        public async static Task Main(string[] args)
        {
            var host = CreateHostBuilder(args).Build();
            await DataHelper.ManageData(host);
            using (var scope = host.Services.CreateScope())
            {
                var services = scope.ServiceProvider;
                var loggerFactory = services.GetRequiredService<ILoggerFactory>();
                try
                {
                    var context = services.GetRequiredService<ApplicationDbContext>();
                    var userManager = services.GetRequiredService<UserManager<BTUser>>();
                    var roleManager = services.GetRequiredService<RoleManager<IdentityRole>>();
                    await ContextSeed.RunSeedMethodsAsync(roleManager, userManager, context);
                }
                catch (Exception ex)
                {
                    var logger = loggerFactory.CreateLogger<Program>();
                    logger.LogError(ex, "An error ocurred seeding the DB.");
                }
            }
            host.Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    //webBuilder.UseStartup<Startup>();
                    webBuilder.CaptureStartupErrors(true);
                    webBuilder.UseSetting(WebHostDefaults.DetailedErrorsKey, "true");
                    webBuilder.UseStartup<Startup>();
                });
    }
}