Kotlin - equivalence to Swift's combination of "if let + cast"

I'm trying to find out how to achieve the combination of "if let + cast" in kotlin:

in swift:

if let user = getUser() as? User {
   // user is not nil and is an instance of User
}

I saw some documentation but they say nothing regarding this combination

https://medium.com/@adinugroho/unwrapping-sort-of-optional-variable-in-kotlin-9bfb640dc709 https://kotlinlang.org/docs/reference/null-safety.html