public async Task AddAsync(Vehicle entity)
        {
            context.ChangeTracker.TrackGraph(entity, e =>
            {
                if (e.Entry.IsKeySet)
                {
                    e.Entry.State = EntityState.Unchanged;
                }
                else
                {
                    e.Entry.State = EntityState.Added;
                }
            });

            //  context.Entry(entity.Owner).State = EntityState.Unchanged;

            LogState(entity);
            await context.Vehicles.AddAsync(entity);

            var entries = context.ChangeTracker.Entries().ToList();

            LogState(entity);
            await context.SaveChangesAsync();

            LogState(entity);
        }
 public virtual async Task AddAsync(T entity)
 {
     entities.Add(entity);
     await context.SaveChangesAsync();
 }