如何將變數從一個頁面傳送到另一個 flutter/dart

您好，我目前正在嘗試在連接步驟期間將用戶的變數條目傳遞到我的應用程式的主頁，但我遇到錯誤，我不知道是什麼原因導致的，在我的頁面main (gamepage) 中，在男孩的孩子中，我想顯示控制器的地址，但是flutter 告訴我這個變數沒有定義!!!!!
你是我唯一的希望

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/widgets.dart';
import 'package:http/http.dart' as http;
import 'package:tentative_formulaire_konamicash/stfgamepage.dart';

class register extends StatefulWidget {
  const register({super.key});

  @override
  State<register> createState() => _registerState();
}

class _registerState extends State<register> {
  final _formKey = GlobalKey<FormState>();
  final controllermail = TextEditingController();
  final controllerpassword = TextEditingController();

  Future<void> login(String mail, String password) async {
    try {
      var url = Uri.parse('https://konamicash.com/authentification_app');
      var response = await http.post(
        url,
        headers: {
          "Accept": "application/json",
          "Access-Control-Allow-Origin": "*"
        },
        body: {
          "the_mail": mail,
          "the_pasword": password,
        },
      );
      if (response.statusCode == 200) {
        var data = jsonDecode(response.body);
        print('OK: $data');
        if (data['authentification'] == 0) {
        } else {
          Navigator.push(
              context,
              PageRouteBuilder(
                pageBuilder: (context, animation, secondaryAnimation) => Gaming(
                  formKey: GlobalKey<FormState>(),
                  controlleradressemail:TextEditingController(),
                  controllermotdepasse : TextEditingController(),
                ),
              ));
        }
      }
    } catch (e) {
      print('An error occurred: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('nami'),
      ),
      body: Form(
        key: _formKey,
        child: Column(
          children: [
            Container(
              child: TextFormField(
                decoration: const InputDecoration(labelText: 'mail'),
                controller: controllermail,
              ),
            ),
            Container(
              child: TextFormField(
                decoration: const InputDecoration(labelText: 'password'),
                controller: controllerpassword,
              ),
            ),
            SizedBox(
              width: double.infinity,
              height: 50,
              child: ElevatedButton(
                onPressed: () {
                  final mail = controllermail.text;

                  final password = controllerpassword.text;

                  login(mail, password);
                },
                child: const Text('Connexion'),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

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