Connecting to URL requires authentication in Kotlin

I'm beginner in kotlin.
I'm try to connect to my http service, which requires authentication.

Have error:

Unresolved reference: Authenticator

How can I set Authenticator?

var url = URL ("https://myURL")val authenticator = object : Authenticator() {    val passwordAuthentication: PasswordAuthentication?        get() = PasswordAuthentication("user","password".toCharArray()        )}