test routes in play when installed silhouette

How can I test routes in play when installed silhouette? How can I authenticate in?

This is test sample

package api

import com.mohiva.play.silhouette.api.LoginInfo
import com.mohiva.play.silhouette.impl.User
import org.specs2.mutable.Specification
import play.api.test._
import play.api.test.Helpers._
import com.mohiva.play.silhouette.test._

class Test extends Specification {

  "respond to the index Action" in new WithApplication() {
    val Some(result) = route(app, FakeRequest(GET, "/api/v1/countries"))
    status(result) must equalTo(OK)
  }
}

This is test output

[info] Test
[info] 
[error] x respond to the index Action
[error]  '401' is not equal to '200' (Test.scala:14)