val gson = GsonBuilder().create()
var tutorialMap: Map<String, Any> = gson.fromJson(body, object : TypeToken<Map<String, Any>>() {}.type)
Log.d("TAG", tutorialMap.toString())
Log.d("TAG", tutorialMap.getValue("data").toString())
val topics = gson.fromJson(tutorialMap.getValue("data").toString(), Array<Topic>::class.java)