Main.scala

implicit val system = ActorSystem("sso-system")
implicit val actorMaterializer = ActorMaterializer()

val oauth2 = new OAuth2Authorization(
  Logging(system, getClass),
  new KeycloakTokenVerifier(
    KeycloakDeploymentBuilder.build(
      getClass.getResourceAsStream("/keycloak.json")
    )
  )
)
import oauth2._

val routes = authorized { token =>
  path("test") {
    get {
      jsonpWithParameter("callback") {
        complete(token)
      }
    }
  }
}

Http().bindAndHandle(routes, "localhost", 9000)