Override SaveChangesAsync to automatically add audit data.

EntityFrameworkCore.Data/DeadBallZoneLeagueDbContext.cs

@@ -42,6 +42,26 @@ public class DeadBallZoneLeagueDbContext : DbContext
       .HasName("GetEarliestMatch");
   }
 
+  public override Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
+  {
+    var entries = ChangeTracker.Entries<BaseDomainModel>().Where(
+      λ => λ.State == EntityState.Modified || λ.State == EntityState.Added
+    );
+    // Whenever a save is made to an entity, these fields are now automatically updated:
+    foreach (var entry in entries)
+    {
+      entry.Entity.ModifiedDate = DateTime.UtcNow;
+      entry.Entity.ModifiedBy = "Sample User 1";
+
+      if (entry.State == EntityState.Added)
+      {
+        entry.Entity.CreatedDate = DateTime.UtcNow;
+        entry.Entity.CreatedBy = "Sample User";
+      }
+    }
+    return base.SaveChangesAsync(cancellationToken);
+  }
+
   public DateTime GetEarliestTeamMatch(int teamId) => throw new NotImplementedException();
 }