How return HTTP Status 403

Hello,

I'm making rest API service with Authentication.

How I can return HTTP Status 403 if user enter invalid login or password?

Now returning Http status 200.

Class RestAPI Extends %CSP.REST
{

XData UrlMap [ XMLNamespace = "http://www.intersystems.com/urlmap" ]
{
<Routes>

<Map Prefix="/restforms" Forward="Form.REST.Main"/>
<Route Url="/auth/:login/:pass" Method="GET" Call="CheckUser" Cors="true"/>
</Routes>
}

ClassMethod CheckUser(userAw, pwdAw) As %String
{

set %response.ContentType = "application/json"

// my code to check auth

Set object = {}
Set object.status = -1
Set object.message = "HTTP/1.1 401 Authorization Required"
w object.%ToJSON()

}

}