sealed class to manage api calls

ResultData.kt

sealed class ResultData<out T> {
    class Loading<out T>: ResultData<T>()

    data class Success<out T>(
        val data: T
    ): ResultData<T>()

    data class Failure<out T>(
        val errorMessage: String?=null, val exception: Exception?= null
    ): ResultData<T>()
}