public static async Task Main(string[] args) { var host = CreateHostBuilder(args).Build(); using (var scope = host.Services.CreateScope()) { var services = scope.ServiceProvider; try { var userManager = services.GetRequiredService <UserManager <User> >(); var rolesManager = services.GetRequiredService <RoleManager <Role> >(); await RoleInitializer.InitAcync(userManager, rolesManager); } catch (Exception ex) { var logger = services.GetRequiredService <ILogger <Program> >(); logger.LogError(ex, "An error occurred while seeding the database."); } } host.Run(); }