I am a beginner in mobile development using Flutter, and I want to set up role-based routing for my app by creating a separate routing file in Dart. My app uses JWT authentication, and the token is already stored locally. However, this is my first time implementing role-based access, and I am not sure how to proceed.

How can I set up role-based routing in Flutter based on the user's role from the JWT token? Any guidance or examples would be greatly appreciated!

here is how i have been managing the routing for the app :

import 'package:flutter/material.dart';
import 'package:stockhive_mobile/screen/admin/departements/Departmentad.dart';
import 'package:stockhive_mobile/screen/admin/users/adduser.dart';
import 'package:stockhive_mobile/screen/auth/introduction_page.dart';
import 'package:stockhive_mobile/screen/auth/login_page.dart';
import 'package:stockhive_mobile/screen/auth/resetpassword.dart';
import 'package:stockhive_mobile/screen/auth/otp.dart';
import 'package:stockhive_mobile/screen/auth/newpassword.dart';
import 'package:stockhive_mobile/screen/auth/editprofile.dart';
import 'package:stockhive_mobile/screen/auth/onboarding.dart';
import 'package:stockhive_mobile/screen/auth/viewprofile.dart';
import 'package:stockhive_mobile/splash/splash_screen.dart';
import '../admin/departements/adddepartementscreen.dart';
import '../admin/users/userscreen.dart';
import 'AdminRoutes.dart'; // Import Admin Routes
import 'collaborator_routes.dart'; // Import Collaborator Routes
import 'package:jwt_decoder/jwt_decoder.dart';

class AppRouter {
  static const String introRoute = '/intro';
  static const String loginRoute = '/login';
  static const String onboardingRoute = '/onboarding';
  static const String resetPasswordRoute = '/fetpassword';
  static const String otpRoute = '/otp';
  static const String newPasswordRoute = '/newpassword';
  static const String editProfileRoute = '/editprofile';
  static const String viewProfileRoute = '/viewprofile';
  static const String usersRoute = '/usersad';
  static const String adduserRoute = '/adduser';
  static const String departmentsRoute = '/department';
  static const String adddepartmentRoute = '/adddepartment';
  static const String infodepartmentRoute = '/infodepartment';
  static const String materielsRoute = '/materiel';
  static const String addmaterielRoute = '/addmateriel';
  /*static const String infomaterielRoute = '/infomateriel';
  static const String dashboardRoute = '/dashboard';*/
  static const String splashRoute = '/splash';

  static Route<dynamic> generateRoute(RouteSettings settings) {
    print('