MoviesApi.kt

private val client = HttpClient(clientEngine) {
    install(JsonFeature) {
        serializer = KotlinxSerializer()
    }
}

suspend fun getPopularMovies(): PopularMoviesEntity {
    val response = client.get<HttpResponse> {
        url {
            protocol = URLProtocol.HTTPS
            host = "api.themoviedb.org/4"
            encodedPath = "/discover/movie"
            parameter("sort_by", "popularity.desc")
            header("Authorization", "Bearer $yourApiKey")
        }
    }

    val jsonBody = response.readText()
    return Json.parse(PopularMoviesEntity.serializer(), jsonBody)
}