viewModel.addPlayer(asPlayer).addOnCompleteListener {
            Log.d("Game", "current destination before joining: "+resources.getResourceEntryName(navController.currentDestination!!.id))
            navController.navigate(R.id.action_joinGameFragment_to_waitingFragment)
        }

//so this observer is not getting detached, maybe manually detach it and reattach it in on resume
        viewModel.gameExists.observe(this, androidx.lifecycle.Observer { exists ->
            //someone ended the game
            var debug = navController
            if(!exists && navController.currentDestination?.id == R.id.gameFragment){ endGame() }
        })

fun endGame(){
        viewModel.endGame()
        Log.d("Game", "current destination before crash: "+resources.getResourceEntryName(navController.currentDestination!!.id))
        timer.cancel()
        Log.d("Game", "current destination before poping: "+resources.getResourceEntryName(navController.currentDestination!!.id))
        navController.popBackStack(R.id.startFragment, false)
        Log.d("Game", "current destination after poping: "+resources.getResourceEntryName(navController.currentDestination!!.id))

    }

2019-06-16 20:13:40.278 13021-13021/com.dangerfield.spyfall D/Game: current destination before poping:  (FRAGMENT C)
2019-06-16 20:13:40.279 13021-13021/com.dangerfield.spyfall D/Game: current destination after poping: (FRAGMENT A)
2019-06-16 20:13:40.279 13021-13021/com.dangerfield.spyfall D/View Model: game =  null
2019-06-16 20:13:40.299 13021-13021/com.dangerfield.spyfall D/GAME: ON DESTROY
2019-06-16 20:13:40.315 13021-13021/com.dangerfield.spyfall D/View Model: game =  null
2019-06-16 20:14:05.289 13021-13021/com.dangerfield.spyfall D/Game: current destination before joining: (FRAGMENT A)
2019-06-16 20:14:05.316 13021-13021/com.dangerfield.spyfall D/Game: on Create
2019-06-16 20:14:05.317 13021-13021/com.dangerfield.spyfall D/Game: onCreateView
2019-06-16 20:14:05.353 13021-13021/com.dangerfield.spyfall D/GAME: ON RESUME
2019-06-16 20:14:05.353 13021-13021/com.dangerfield.spyfall D/Game: current destination before crash: (FRAGMENT C)
019-06-16 20:14:05.359 13021-13021/com.dangerfield.spyfall E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.dangerfield.spyfall, PID: 13021
    kotlin.UninitializedPropertyAccessException: lateinit property timer has not been initialized
        at com.dangerfield.spyfall.game.GameFragment.endGame(GameFragment.kt:158)