RetrofitClient.kt

object RetrofitClient {
    private const val BASE_URL = ""
    private lateinit var retrofit: Retrofit

    fun getClient(): APIService {
        if (retrofit == null) {
            retrofit = Retrofit.Builder()
                .baseUrl(BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build()
        }
        return retrofit.create(APIService::class.java)
    }
}