Currently how I define my routes for api's in Go. Up for discussion

recipes.go

type Recipe struct{}

func NewRecipe(*router router) *router {
  router.HandleFunc("/recipe/{id}", GetById)
}

func GetById(writer w, *request r) *handler {
  //do something
}

routes.go

  r := mux.NewRouter()
	r.StrictSlash(true)
	apiV1 := r.PathPrefix("/api/v1").Subrouter()
        recipeRouter := Recipe.NewRecipe(r.PathPrefix("/api").SubRouter())
  //recipes
	apiV1.HandleFunc("/{userID}/recipes/", ws.GetAllRecipes).Methods("GET")
	apiV1.HandleFunc("/{userID}/recipes/{recipeID}", ws.GetRecipeByID).Methods("GET")
	apiV1.HandleFunc("/{userID}/recipes/", ws.CreateRecipe).Methods("POST")
	apiV1.HandleFunc("/{userID}/recipes/{recipeID}", ws.EditRecipe).Methods("PUT")
	apiV1.HandleFunc("/{userID}/recipes/{recipeID}", ws.DeleteRecipe).Methods("DELETE")
  //fermentables
	apiV1.HandleFunc("/fermentables/", ws.GetFermentables).Methods("GET")
	apiV1.HandleFunc("/fermentables/{id}", ws.GetFermentable).Methods("GET")
  //yeasts
	apiV1.HandleFunc("/yeasts/", ws.GetYeasts).Methods("GET")
	apiV1.HandleFunc("/yeasts/{id}", ws.GetYeast).Methods("GET")

  //middleware for CORS
	handler := cors.New(cors.Options{
		AllowedOrigins:   []string{"http://localhost:8081"},
		AllowCredentials: true,
	}).Handler(r)

	log.Printf("Running at %s\n", address)

	server := &http.Server{
		Addr:    address,
		Handler: handler,
		//		TLSConfig: config,
	}

	log.Fatal(server.ListenAndServe())