Set access modifier (#402)

@@ -78,7 +78,7 @@ class MainActivity : ComponentActivity() {
             LKLog.i { "network connection available, reconnecting" }
             LKLog.i { "network connection available, reconnecting" }
         }
         }
     }
     }
-    val viewModel by viewModels<MainViewModel>()
+    private val viewModel by viewModels<MainViewModel>()
     override fun onCreate(savedInstanceState: Bundle?) {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         super.onCreate(savedInstanceState)