Is this way to have both functionality of a buyer and seller in single app correct? Tell me the best approach to declare navigation for both of them and also the whole navigation is wrapped in a bottomnavigation scaffold.
And I am using that scaffold to show bottom navigation bar at different screens.

@Composable
fun MasterNavigation (
    navController: NavHostController,
    currentUser:FirebaseUser?,
    userType: UserType?,
    sharedViewModel: SharedViewModel = hiltViewModel()
) {
    val currentuser = Firebase.auth.currentUser

    var startDestination = "Auth_Graph"
    if(currentuser !=null){
//                    startDestination = "App_Navigation"
        if(userType == UserType.CUSTOMER){
            startDestination = "Buyer_App_Navigation"
        }
        else if(userType == UserType.PROVIDER){
            startDestination = "App_Navigation"
        }
        else{
            startDestination = "App_Navigation"
        }

//        startDestination = "test"
    }

    NavHost(navController = navController,startDestination = startDestination ){

        composable("test"){
            LoginScreen(navController = navController)
        }
        navigation(route= "Auth_Graph",startDestination = "Login_Screen"){
            composable("Login_Screen"){
                LoginScreen(navController)
            }
            composable("Register_Screen"){
                RegisterScreen(navController)
            }
        }
        navigation(route = "App_Navigation",startDestination = "Home_Screen" ){
            composable("Home_Screen"){
//            AddProductScreen()
                HomeScreen(sharedViewModel = sharedViewModel,navController)

            }
            composable("Chat_Screen"){
                ChatScreen()
            }
            composable("Market_Price_Screen"){
                MarketPriceScreen()
            }
            composable("Add_Product_Screen"){
                AddProductScreen()
            }
            composable("Profile_Screen"){
                ProfileScreen(navController = navController)
            }
            navigation(route="Edit_Product",startDestination = "Edit_Product_Screen"){
                composable("Edit_Product_Screen"){
                    EditProductScreen(navController,sharedViewModel)
                }
            }

        }
        navigation(route = "Buyer_App_Navigation",startDestination = "Buyer_Home_Screen"){
            composable("Buyer_Home_Screen"){
                BuyerHomeScreen(navController)
            }
            composable("Chat_Screen"){
                ChatScreen()
            }
            composable("Market_Price_Screen"){
                MarketPriceScreen()
            }

            composable("Profile_Screen"){
                ProfileScreen(navController = navController)
            }
            navigation(route="Product_Detail",startDestination = "Product_Detail_Screen"){
                composable("Product_Detail_Screen"){
                    ProductDetailScreen(navController,sharedViewModel)
                }
            }


        }

    }

}