writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}
	globalNotificationSys.LoadTransitionTierConfig(ctx)

	writeSuccessNoContent(w)
}

func (api adminAPIHandlers) ListTierHandler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	objAPI, _ := validateAdminReq(ctx, w, r, policy.ListTierAction)
	if objAPI == nil {
		return
	}

		adminRouter.Methods(http.MethodPost).Path(adminVersion + "/tier/{tier}").HandlerFunc(adminMiddleware(adminAPI.EditTierHandler))
		adminRouter.Methods(http.MethodGet).Path(adminVersion + "/tier").HandlerFunc(adminMiddleware(adminAPI.ListTierHandler))
		adminRouter.Methods(http.MethodDelete).Path(adminVersion + "/tier/{tier}").HandlerFunc(adminMiddleware(adminAPI.RemoveTierHandler))