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firebase - Using TextField inside a Streambuilder

How do we add a TextField inside a StreamBuilder? I have a TextField / TextFormField as one of the widgets inside the builder function of either a StreamBuilder or FutureBuilder, whenever we try to interact with the textfield it just refreshes the entire builder widget and calls the stream/future again.

body: StreamBuilder(
      stream: getClientProfile().snapshots(),
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.active) {
          print(snapshot.data.data);
          Client tempClient = Client.from(snapshot.data);
          print('details = ${tempClient.representative.email} ${tempClient
              .address.location} ${tempClient.businessDescription}');
          return Container(
            child: Column(
              children: <Widget>[
                TextFormField(

                )
              ],
            ),
          );
        } else if (snapshot.connectionState == ConnectionState.waiting) {
          return Center(child: CircularProgressIndicator());
        } else {
          return Center(
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                Padding(
                  padding: const EdgeInsets.all(8.0),
                  child: Icon(Icons.error),
                ),
                Text('Error loading data')
              ],
            ),
          );
        }
      }),

and firestore function

DocumentReference getClientProfile() {
   return _firestore.collection(SELLERS_COLLECTION).document(_uid);
}

What I want to achieve, is to have a form with pre-filled data from firestore document, basically an edit form. Is there any other way I could achieve the same or am I doing something wrong structurally ?

EDIT:

code after suggested edits.

    import 'package:flutter/material.dart';
import 'Utils/globalStore.dart';
import 'models/client_model.dart';
import 'dart:async';

class EditProfileInformation extends StatefulWidget {
  @override
  EditProfileInformationState createState() {
    return new EditProfileInformationState();
  }
}

class EditProfileInformationState extends State<EditProfileInformation> {
  Stream dbCall;
  final myController = TextEditingController();

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    dbCall = getClientProfile().snapshots();
    myController.addListener(_printLatestValue);
  }

  _printLatestValue() {
    print("Second text field: ${myController.text}");
  }

  @override
  void dispose() {
    myController.removeListener(_printLatestValue);
    myController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
//      key: _scaffoldKey,
      appBar: AppBar(
        title: Text(
          'Edit profile',
          style: TextStyle(),
        ),
      ),

      body: StreamBuilder(
          stream: dbCall,
          builder: (context, snapshot) {
            if (snapshot.connectionState == ConnectionState.active) {
              print(snapshot.data.data);
              Client tempClient = Client.from(snapshot.data);
              print('details = ${tempClient.representative.email} ${tempClient
                  .address.location} ${tempClient.businessDescription}');
              return Container(
                child: Column(
                  children: <Widget>[
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: TextField(
                        controller: myController,
                      ),
                    )
                  ],
                ),
              );
            } else if (snapshot.connectionState == ConnectionState.waiting) {
              return Center(child: CircularProgressIndicator());
            } else {
              return Center(
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.center,
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: Icon(Icons.error),
                    ),
                    Text('Error loading data')
                  ],
                ),
              );
            }
          }),
      floatingActionButton: FloatingActionButton(
        onPressed: () {

        },
        child: Icon(Icons.done),
      ),
    );
  }
}
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