ServiceStack AutoQuery not working with Code First approach

Question

I already use ServiceStack OrmLite for quering my database, but now I want to create some CRUD API's myself. I have a separate project where my POCO's are declared with the ServiceStack DataAnnotations.

An example class of my POCO project:

    public class DropPosition
    {        
        [PrimaryKey, AutoIncrement]
        public long Id { get; set; }
        public int PositionId { get; set; }
        public string PositionBarcode { get; set; }
        public string BoxBarcode { get; set; }
        public int? OrderReference { get; set; }
        public DateTime? StartTime { get; set; }
        public DateTime? EndTime { get; set; }
        public bool ActivateLight { get; set; }

        [Reference]
        public virtual List<WorkOrder> WorkOrders { get; set; } = new List<WorkOrder>();
    }

Now I've created a new web project so I can serve my API endpoints using AutoQuery, and extended the POCO class:

    public class DropPosition
    {        
        [PrimaryKey, AutoIncrement]
        public long Id { get; set; }
        public int PositionId { get; set; }
        public string PositionBarcode { get; set; }
        public string BoxBarcode { get; set; }
        public int? OrderReference { get; set; }
        public DateTime? StartTime { get; set; }
        public DateTime? EndTime { get; set; }
        public bool ActivateLight { get; set; }

        [Reference]
        public virtual List<WorkOrder> WorkOrders { get; set; } = new List<WorkOrder>();
    }

    [Route("/DropPositions", "GET")]
    [Route("/DropPositions/{Id}", "GET")]
    public class QueryDropPositions : QueryDb<DropPosition>
    {
        public long Id { get; set; }
        public int PositionId { get; set; }
        public string PositionBarcode { get; set; }
        public string BoxBarcode { get; set; }
        public int? OrderReference { get; set; }
        public bool ActivateLight { get; set; }
    }

    [Route("/DropPositions", "POST")]
    public class CreateDropPosition : ICreateDb<DropPosition>, IReturn<DropPosition>
    {
        public int PositionId { get; set; }
        public string PositionBarcode { get; set; }
        public string BoxBarcode { get; set; }
        public int? OrderReference { get; set; }
        public DateTime? StartTime { get; set; }
        public DateTime? EndTime { get; set; }
        public bool ActivateLight { get; set; }
    }

    [Route("/DropPositions/{Id}", "PUT")]
    public class UpdateDropPosition : IUpdateDb<DropPosition>, IReturn<DropPosition>
    {
        public long Id { get; set; }
        public int PositionId { get; set; }
        public string PositionBarcode { get; set; }
        public string BoxBarcode { get; set; }
        public int? OrderReference { get; set; }
        public DateTime? StartTime { get; set; }
        public DateTime? EndTime { get; set; }
        public bool ActivateLight { get; set; }
    }

    [Route("/DropPositions/{Id}", "DELETE")]
    public class DeleteDropPosition : IDeleteDb<DropPosition>, IReturnVoid
    {
        public long Id { get; set; }
    }

And then followed the best pratice examples like this and referenced my POCO project.

    public class AppHost: AppHostBase, IHostingStartup
    {
        public AppHost() : base("AutoQuery", typeof(ServiceStackService).Assembly)
        {
        }

        public override void Configure(Container container)
        {
            // configure ServiceStack only IOC, Config & Plugins
            SetConfig(new HostConfig
            {
                DebugMode = true
            });

            // auto query
            Plugins.Add(new AutoQueryFeature
            {
                MaxLimit = 1000,
                //GenerateCrudServices = new GenerateCrudServices
                //{
                //    AutoRegister = true
                //}
            });
         
        }

        public void Configure(IWebHostBuilder builder)
        {
            builder.Configure(app =>
            {
                if (!HasInit)
                {
                    app.UseServiceStack(new AppHost());
                }

            });

            builder.ConfigureServices((context, services) =>
            {
                // ormlite               
                var sorterConnectionFactory = new OrmLiteConnectionFactory(ConnectionStrings.SorterLocal, SqlServerDialect.Provider);

                // unicode              
                sorterConnectionFactory.DialectProvider.GetStringConverter().UseUnicode = true;
              
                // register
                services.AddSingleton<IDbConnectionFactory>(sorterConnectionFactory);

            });
        }
    }

But I can't see my new API endpoints using the api explorer... But when I activate the GenerateCrudServices options, I see the auto-generated API endpoints. Did I forgot something? Should I change my code for only using my own declared AutoQuery CRUD API's?

I've tried to follow the example BookingsCrud