organización de webapi

[alonsouribe]

buen día

estoy teniendo un problema en organizar mi webapi (mvc), la idea es tener concentrado en carpetas micro-sistemas que se usarán como servicios, la cuestión es que me marca el error:

Código:

Message:An error has occurred.","ExceptionMessage":"Multiple types were found that match the controller named 'login'. This can happen if the route that services this request ('api/resultados/{controller}/{action}') found multiple controllers defined with the same name but differing namespaces, which is not supported.\r\n\r\nThe request for 'login' has found the following matching controllers:\r\nApi.Controllers.Auth.LoginController\r\nApi.Controllers.Users.LoginController

ExceptionType: System.InvalidOperationException","StackTrace":"   at System.Web.Http.Dispatcher.DefaultHttpControllerSelector.SelectController(HttpRequestMessage request)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()

así esta mi webapiconfig.cs

Código:

            config.Routes.MapHttpRoute(
                name: "Api.Auth",
                routeTemplate: "api/auth/{controller}/{action}"
            );

            config.Routes.MapHttpRoute(
                name: "Api.Users",
                routeTemplate: "api/users/{controller}/{action}"
            );

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );

Como puedo configurar mi webapi o routes para que puedan funcionar en carpetas?

de antemano, gracias.