Handle Api response in Ktor

hey I am trying to learn ktor for my api request. I am reading Response validation in doc.

ApiResponse.kt

sealed class ApiResponse<out T : Any> {
    data class Success<out T : Any>(
        val data: T?
    ) : ApiResponse<T>()

    data class Error(
        val exception: Throwable? = null,
        val responseCode: Int = -1
    ) : ApiResponse<Nothing>()

    fun handleResult(onSuccess: ((responseData: T?) -> Unit)?, onError: ((error: Error) -> Unit)?) {
        when (this) {
            is Success -> {
                onSuccess?.invoke(this.data)
            }
            is Error -> {
                onError?.invoke(this)
            }
        }
    }
}

@Serializable
data class ErrorResponse(
    var errorCode: Int = 1,
    val errorMessage: String = "Something went wrong"
)

I have this ApiResponse class in which, I want to handle api response through this post. As you see in the link, there is function called fetchResult, inside that code is checking every time response.code() and route according to domain specific Success or Error body. Is there any better way it will automatically route on specific domain rather than checking every time in ktor.

actual fun httpClient(config: HttpClientConfig<*>.() -> Unit) = HttpClient(OkHttp) {
    config(this)
    install(Logging) {
        logger = Logger.SIMPLE
        level = LogLevel.BODY
    }
    expectSuccess = false
    HttpResponseValidator {
        handleResponseExceptionWithRequest { exception, _ ->
            val errorResponse: ErrorResponse
            when (exception) {
                is ResponseException -> {
                    errorResponse = exception.response.body()
                    errorResponse.errorCode = exception.response.status.value
                }
            }
        }
    }
}

KtorApi.kt

class KtorApi(private val httpClient: HttpClient) {
    suspend fun getAbc(): Flow<KtorResponse> {
        return httpClient.get {
            url("abc")
        }.body()
    }
}