Creating an flutter app in vs code with firebase its showing the specific errors .Errors that showing is mentioned below and the signup widget code - flutter

Question

'The name UserRecord isn't a type so it can't be used as a type argument Try correcting the name to an existing type or defining a type named UserRecord
The method 'queryUserRecordOnce' isn't defined for the type '_SignupWidgetState'.
Try correcting the name to the name of an existing method, or defining a method named 'queryUserRecordOnce'
The method 'createUserRecordData' isn't defined for the type '_SignupWidgetState'.
Try correcting the name to the name of an existing method, or defining a method named 'createUserRecordData''
*import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'login.dart';
import 'package:easy_debounce/easy_debounce.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:easy_debounce/easy_debounce.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:google_fonts/google_fonts.dart';
class SignupWidget extends StatefulWidget {
const SignupWidget({Key key}) : super(key: key);
#override
_SignupWidgetState createState() => _SignupWidgetState();
}
class _SignupWidgetState extends State<SignupWidget> {
TextEditingController emailTextController;
TextEditingController textController1;
TextEditingController textController2;
TextEditingController passwordTextController;
bool passwordVisibility;
var collection = FirebaseFirestore.instance.collection('UserRecord');
final auth = FirebaseAuth.instance;
final scaffoldKey = GlobalKey<ScaffoldState>();
#override
void initState() {
super.initState();
emailTextController = TextEditingController();
textController1 = TextEditingController();
textController2 = TextEditingController();
passwordTextController = TextEditingController();
passwordVisibility = false;
}
#override
Widget build(BuildContext context) {
return Scaffold(
key: scaffoldKey,
body: SafeArea(
child: GestureDetector(
onTap: () => FocusScope.of(context).unfocus(),
child: Align(
alignment: AlignmentDirectional(0.3, -0.8),
child: Container(
width: double.infinity,
height: double.infinity,
decoration: BoxDecoration(
color: Color(0xFFEEEEEE),
),
child: Padding(
padding: EdgeInsetsDirectional.fromSTEB(0, 100, 0, 0),
child: ListView(
padding: EdgeInsets.zero,
shrinkWrap: true,
scrollDirection: Axis.vertical,
children: [
Align(
alignment: AlignmentDirectional(0.2, -0.35),
child: Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.end,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Expanded(
child: Align(
alignment: AlignmentDirectional(-0.55, -0.35),
child: InkWell(
onTap: () async {
Navigator.pop(context);
},
child: const FaIcon(
FontAwesomeIcons.arrowLeft,
color: Color.fromRGBO(5, 4, 0, 5),
size: 24,
),
),
),
),
const Expanded(
child: Align(
alignment: AlignmentDirectional(-2.5, -0.1),
child: Text(
'Signup',
style: TextStyle(
fontFamily: 'Oswald',
color: Color(0xFF0F5AA5),
fontSize: 40,
fontWeight: FontWeight.bold,
),
),
),
),
],
),
),
Align(
alignment: AlignmentDirectional(0, 0),
child: Column(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.end,
children: [
Align(
alignment: AlignmentDirectional(0, 0.05),
child: Container(
width: 250,
height: 400,
decoration: const BoxDecoration(
gradient: LinearGradient(
colors: [
Color(0xFF0F5AA5),
Color(0xFF0F5AA5),
],
stops: [0, 0, 1],
begin: AlignmentDirectional(0, -1),
end: AlignmentDirectional(0, 1),
),
),
alignment: AlignmentDirectional(
-0.09999999999999998, 0.5),
child: Align(
alignment: AlignmentDirectional(-0.1, 1),
child: Column(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.end,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Padding(
padding: EdgeInsetsDirectional.fromSTEB(
10, 15, 10, 0),
child: TextFormField(
controller: emailTextController,
onChanged: (_) => EasyDebounce.debounce(
'emailTextController',
Duration(milliseconds: 2000),
() => setState(() {}),
),
autofocus: true,
obscureText: false,
decoration: InputDecoration(
hintText: 'Mobile or Email',
hintStyle: const TextStyle(
fontFamily: 'Poppins',
color: Color(0xFF000509),
),
enabledBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xFF080F18),
width: 1,
),
borderRadius:
BorderRadius.circular(5),
),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xFF080F18),
width: 1,
),
borderRadius:
BorderRadius.circular(5),
),
suffixIcon: emailTextController
.text.isNotEmpty
? InkWell(
onTap: () => setState(
() => emailTextController
?.clear(),
),
child: Icon(
Icons.clear,
color: Color(0xFF757575),
size: 22,
),
)
: null,
),
style: TextStyle(
fontFamily: 'Poppins',
color: Color(0xFF1A1F24),
),
),
),
Padding(
padding: EdgeInsetsDirectional.fromSTEB(
10, 10, 10, 0),
child: TextFormField(
controller: textController1,
onChanged: (_) => EasyDebounce.debounce(
'textController1',
Duration(milliseconds: 1000),
() => setState(() {}),
),
autofocus: true,
obscureText: false,
decoration: InputDecoration(
hintText: 'Full name',
hintStyle: TextStyle(
fontFamily: 'Poppins',
color: Color(0xFF000509),
),
enabledBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xFF080F18),
width: 1,
),
borderRadius:
BorderRadius.circular(5),
),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xFF080F18),
width: 1,
),
borderRadius:
BorderRadius.circular(5),
),
suffixIcon: textController1
.text.isNotEmpty
? InkWell(
onTap: () => setState(
() => textController1
?.clear(),
),
child: Icon(
Icons.clear,
color: Color(0xFF757575),
size: 22,
),
)
: null,
),
style: TextStyle(
fontFamily: 'Poppins',
color: Color(0xFF1A1F24),
),
textAlign: TextAlign.start,
),
),
Padding(
padding: EdgeInsetsDirectional.fromSTEB(
10, 10, 10, 0),
child: TextFormField(
controller: textController2,
onChanged: (_) => EasyDebounce.debounce(
'textController2',
Duration(milliseconds: 1000),
() => setState(() {}),
),
autofocus: true,
obscureText: false,
decoration: InputDecoration(
hintText: 'User name',
hintStyle: TextStyle(
fontFamily: 'Poppins',
color: Color(0xFF000509),
),
enabledBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xFF080F18),
width: 1,
),
borderRadius:
BorderRadius.circular(5),
),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xFF080F18),
width: 1,
),
borderRadius:
BorderRadius.circular(5),
),
suffixIcon: textController2
.text.isNotEmpty
? InkWell(
onTap: () => setState(
() => textController2
?.clear(),
),
child: Icon(
Icons.clear,
color: Color(0xFF757575),
size: 22,
),
)
: null,
),
style: TextStyle(
fontFamily: 'Poppins',
color: Color(0xFF1A1F24),
),
textAlign: TextAlign.start,
),
),
Padding(
padding: EdgeInsetsDirectional.fromSTEB(
10, 10, 10, 25),
child: FutureBuilder<List<UserRecord>>(
future: queryUserRecordOnce(
singleRecord: true,
),
builder: (context, snapshot) {
// Customize what your widget looks like when it's loading.
if (!snapshot.hasData) {
return const Center(
child: SizedBox(
width: 50,
height: 50,
child:
CircularProgressIndicator(
color: Colors.black,
),
),
);
}
List<UserRecord>
textFieldUserRecordList =
snapshot.data;
final textFieldUserRecord =
textFieldUserRecordList.isNotEmpty
? textFieldUserRecordList
.first
: null;
return TextFormField(
controller: passwordTextController,
onChanged: (_) =>
EasyDebounce.debounce(
'passwordTextController',
Duration(milliseconds: 1000),
() => setState(() {}),
),
autofocus: true,
obscureText: !passwordVisibility,
decoration: InputDecoration(
hintText: 'Password',
hintStyle: TextStyle(
fontFamily: 'Poppins',
color: Color(0xFF000509),
),
enabledBorder:
UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xFF080F18),
width: 1,
),
borderRadius:
BorderRadius.circular(5),
),
focusedBorder:
UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xFF080F18),
width: 1,
),
borderRadius:
BorderRadius.circular(5),
),
suffixIcon: InkWell(
onTap: () => setState(
() => passwordVisibility =
!passwordVisibility,
),
focusNode: FocusNode(
skipTraversal: true),
child: Icon(
passwordVisibility
? Icons
.visibility_outlined
: Icons
.visibility_off_outlined,
color: Color(0xFF757575),
size: 22,
),
),
),
style: TextStyle(
fontFamily: 'Poppins',
color: Color(0xFF1A1F24),
),
textAlign: TextAlign.start,
);
},
),
),
Padding(
padding: EdgeInsetsDirectional.fromSTEB(
0, 0, 0, 30),
child: ElevatedButton(
onPressed: () async {
final user = await FirebaseAuth
.instance
.createUserWithEmailAndPassword(
email:
emailTextController.text,
password:
passwordTextController
.text);
if (user == null) {
return;
}
final userCreateData =
createUserRecordData(
username: textController2.text,
pass: passwordTextController.text,
email: emailTextController.text,
uid: textController1.text,
);
await UserRecord.collection
.doc(user.uid)
.update(userCreateData);
await Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
LoginWidget(),
),
);
},
child: Text("signup"),
),
),
],
),
),
),
),
],
),
),
],
),
),
),
),
),
),
);
}
}*