suspend-function-five.kt

suspend fun makeLogin(login: String, password: String, callback: (Token) -> Unit) {
    // request login
    callback(token)
}

suspend fun loadMovies(callback: (List<Movie>) -> Unit) {
    makeLogin("someValue", "someValue") { token -> 
         // request movies with token
         callback(movies)
    }
}

fun someFunction() {
    loadMovies { movies ->
        printMovies(movies)
    }
}