The requested resource does not support http method 'GET'

Good Day All

i have a web api with a controller like this

 public class RegistrationController : ApiController
    {
        [System.Web.Http.AcceptVerbs("GET", "POST")]
        [System.Web.Http.HttpGet]
        public int Get([FromBody]Registration model)
        {
            try
            {
                GetMyContact.Services.Database.Database db = new Database.Database();
                db.RegisterUser(model);

                var response = Request.CreateResponse<string>(HttpStatusCode.Created, string.Empty);
                string uri = Url.Link("DefaultApi", new { id = model.USER_ID });
                response.Headers.Location = new Uri(uri);
                return model.USER_ID;
            }
            catch(Exception ex)
            {
                HttpStatusCode statusCode = HttpStatusCode.BadRequest;

                var errResponse = Request.CreateResponse<string>(statusCode, ex.Message);
                throw new HttpResponseException(errResponse);
            }
            }
         
    }

and the config is like this

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

and i am testing it using the following URL just to see if i will hit that breakpoint http://localhost:39194/api/Registration

but i get the following error on the browser

<Error>
<Message>
The requested resource does not support http method 'GET'.
</Message>
</Error>

Thanks

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