ChristopherME

class SomeViewModel(private val getUserUseCase: GetUserUseCase) : ViewModel() {
  
  // Only your viewmodel should update the value.
   private val _user: MutableLiveData<User> = MutableLiveData()
   val userName: LiveData<String> = _user.map {
     resultUser -> "${resultUser.name} + ${resultUser.lastName}" 
   }
  
  ...
  

ChristopherME

class SomeViewModel(private val getUserUseCase: GetUserUseCase) : ViewModel() {
  
  // Only your viewmodel should update the value.
   private val _userName: MutableLiveData<String> = MutableLiveData()
   val userName: LiveData<String>
     get() = _userName
  
  ...
  
  private fun executeUseCase() {

ChristopherME

import android.content.ContentUris
import android.content.Context
import android.database.Cursor
import android.net.Uri
import android.os.Build
import android.os.Environment
import android.provider.DocumentsContract
import android.provider.MediaStore
import android.util.Log
import java.io.*