I use ServiceStack to create an API. I want to perform authentication in a Request Filter. I have created a class that inherits RequestFilterAttribute and overrides method

```
void Execute(IRequest req, IResponse res, object requestDto)

```

In the override when the authentication fails, I want to prevent the request to continue with the service method and I want to return a specific message. For ending the request I can use one of these methods:

```
res.Close();
res.End();
res.EndHttpHandlerRequest();
res.EndRequest();
res.EndRequestWithNoContent();

```

They prevent the execution of the method in the service. When ending the response I want to have a specific DTO with a message. So before ending the response, I assign a DTO object to the property

```
res.Dto = myResponseDto;

```

However, the result from the API call is without any data. Can anybody help with preventing in the filter a request to reach the ServiceStack service implementation, but returning the desired DTO response object?