1. in view

                      import 'package:flutter/material.dart';
import 'package:vera/controllers/login_controller.dart';
import 'package:get/get.dart';
import 'package:vera/models/user_model.dart';
import 'package:vera/widgets/bottom_nav.dart';

class LoginPage extends StatelessWidget {
  @override

  final LoginController controller = Get.put(LoginController());

  // To listen to the changes in the textfield.
  TextEditingController _name = TextEditingController();
  TextEditingController _email = TextEditingController();
  TextEditingController _phoneno = TextEditingController();

  Widget build(BuildContext context) {
    List<UserModel> userList = controller.userList;


    return GetBuilder<LoginController>(
        builder: (controller) => Scaffold(

            body: Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [

                  Padding(
                    padding: const EdgeInsets.all(25),
                    child: TextField(

                      // To set the appropriate controller to the text field.
                      controller: _name,
                      decoration: InputDecoration(
                          border: OutlineInputBorder(), labelText: "Enter your Name"),
                    ),
                  ),

                  Padding(
                    padding: const EdgeInsets.all(25),
                    child: TextField(
                      controller: _email,
                      decoration: InputDecoration(
                          border: OutlineInputBorder(),
                          labelText: "Enter your Email"),
                    ),
                  ),

                  Padding(
                    padding: const EdgeInsets.all(25),
                    child: TextField(
                      controller: _phoneno,
                      decoration: InputDecoration(
                          border: OutlineInputBorder(),
                          labelText: "Enter your Phone Number"),
                    ),
                  ),


                  // Button to go to nextpage.
                  ElevatedButton(
                      onPressed: () {



                      },
                      child: Text("SEND"))
                ],
              ),
            ),
          //bottomNavigationBar:BottomNavBar()

        )
    );
  }
}





2. Controller 

move the input controller variables to getXController

  TextEditingController _name = TextEditingController();
  TextEditingController _email = TextEditingController();
  TextEditingController _phoneno = TextEditingController();