IM_NEW/User.Infrastructure/UserDbContext.cs

using IdentityService.Domain.Entities;
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;

namespace IdentityService.Infrastructure
{
    public class UserDbContext : IdentityDbContext<IdentityService.Domain.Entities.User, Role, Guid>
    {
        private IMediator? mediator;
        public DbSet<IdentityService.Domain.Entities.User> Users { get; private set; }

        public UserDbContext(DbContextOptions<UserDbContext> options, IMediator mediator)
            : base(options)
        {
            this.mediator = mediator;
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            modelBuilder.ApplyConfigurationsFromAssembly(this.GetType().Assembly);
            modelBuilder.EnableSoftDeletionGlobalFilter();
        }

        public async override Task<int> SaveChangesAsync(bool acceptAllChangesOnSuccess, CancellationToken cancellationToken = default)
        {
            if (mediator != null)
            {
                await mediator.DispatchDomainEventsAsync(this);
            }
            return await base.SaveChangesAsync(acceptAllChangesOnSuccess, cancellationToken);
        }
    }
}