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1. Am having an error wrapper class ove... Am having an error wrapper class over the normal Exception interface, with this I can parse errors and handle them for a better response , for example the Socket timeout exception which is common in most network requests.

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   sealed class AppError(

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       override val message: String? = null

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   ) : Exception(){

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        data object SocketTimeOutError : AppError("Failed to connect, please check your internet connection and retry.") 

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   }

2. An abstraction of spring security ... An abstraction of spring security methods to interact with the jwt, requires the libraries jjwt-api jjwt-impl jjwt-jackson The implementation is really similar but can be customized

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   public interface JwtService {

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       final String SECRET_KEY = "";

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3. A viewmodel factory, can be used to ... A viewmodel factory, can be used to provision a viewmodel from a kotlin application that has lifecycle.

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   @Suppress("UNCHECKED_CAST")

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   class MainViewModelFactory(val application: Application) : ViewModelProvider.Factory {

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       override fun <T : androidx.lifecycle.ViewModel> create(modelClass: Class<T>): T {

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           return MainViewModel(application) as T

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       }