DocumentOrganizer/Diligent.WebAPI.Data/DataSeeder.cs

using Microsoft.AspNetCore.Identity;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Diligent.WebAPI.Data
{
    public class DataSeeder
    {
        public static async void Seed(IServiceProvider serviceProvider)
        {
            using var scope = serviceProvider.CreateScope();
            var databaseContext = scope.ServiceProvider.GetRequiredService<DatabaseContext>();
            var userManager = scope.ServiceProvider.GetRequiredService<UserManager<User>>();
            if (!databaseContext.Users.Any())
            {
                var superAdmin = new User
                {
                    AccessFailedCount = 0,
                    Email = "admin@dilig.net",
                    FirstName = "SuperAdmin",
                    LastName = "SuperAdmin",
                    UserName = "superAdmin",
                    EmailConfirmed = true
                };

                await userManager.CreateAsync(superAdmin, "Nekasifra123!");
                await userManager.AddToRoleAsync(superAdmin, "SuperAdmin");
                await databaseContext.SaveChangesAsync();
            }
        }
    }
}