I am working on a project which is based on firebase authentication (Email/password).
I need to add change password Options. when try to change credential showing error.
Error "The password is invalid or the user does not have a password."
I have tried with this code.
FirebaseAuth auth = FirebaseAuth.instance;
checkUser() {
if (auth.currentUser != null) {
print(auth.currentUser.email);
changePass();
} else {
print("user not found");
}
}
void changePass() async {
print("clicked");
EmailAuthCredential credential =
EmailAuthProvider.credential(email: auth.currentUser.email, password: "Password#3221");
await auth.currentUser.reauthenticateWithCredential(credential);
}
use this one for reset password:
Future resetpassword (String email)
async
{
await _auth.sendPasswordResetEmail(email: email);
}
Related
I can save the email and the password with Firebase Authentication. I also save this information with Cloud Firestore. But how can I add and save the displayName after registering?
my code:
Future registerWithEmailAndPassword(String email, String password) async {
try {
AuthResult result = await _auth.createUserWithEmailAndPassword(
email: email, password: password);
FirebaseUser user = result.user;
// create a new document for the user with the uid
await DatabaseService(uid: user.uid)
.updateUserData('User', user.email, 'test.de/test.png', user.uid);
return _userFromFirebaseUser(user);
} catch (e) {
print(e.toString());
return null;
}
}
the register form button:
onPressed: () async {
if (_formKey.currentState.validate()) {
setState(() => loading = true);
dynamic result = await _auth
.registerWithEmailAndPassword(
email, password);
if (result == null) {
setState(() {
error = 'Valid email, please';
loading = false;
});
}
}
}
You can use updateProfile method given in the FirebaseUser class to update the name and photo url.
updateProfile({String displayName, String photoURL}).
For email you can use the different method
updateEmail(String newEmail) which is a async method.
Or to save the username directly into the firestore, after successful login you can use 'set' method of the FirebaseFirestore to save email, password and the username.
Here's the code if you want to save the Username together with the email and password
final FirebaseAuth _auth = FirebaseAuth.instance;
//register with email & password & save username instantly
Future registerWithEmailAndPassword(String name, String password, String email) async {
try {
UserCredential result = await _auth.createUserWithEmailAndPassword(email: email, password: password);
User user = result.user;
user.updateProfile(displayName: name); //added this line
return _user(user);
} catch(e) {
print(e.toString());
return null;
}
}
late User userFirebase;
Future<UserCredential> userCredential =await //Your code signin or signup
await userCredential.then((UserCredential value) {
userFirebase = value.user!;
});
await userFirebase.updateDisplayName(event.name);
You can use updateDisplayName() and updatePhotoURL() methods on a User object to add the displayName/profile image to Firebase user.
final userCredential = await _auth.createUserWithEmailAndPassword(
email: email,
password: password,
);
//After creating a user in Firebase, we then are able to change name/pictue
await userCredential.user?.updateDisplayName(name);
await userCredential.user?.updatePhotoURL(imageUrl);
As of october 2021, updateProfile() is deprecated, and you should use updateDisplayName() and updatePhotoURL() instead.
Flutter is not writing data to my firebase collection and has errors in the debug.
Steps to reproduce
https://www.youtube.com/watch?v=EA7973HI93E&list=PL4cUxeGkcC9j--TKIdkb3ISfRbJeJYQwC&index=18
Steps to reproduce the behavior:
Run the app,
register a user.
Expected behavior:
I expected that the user will be made and data to the collection added
the output
Ignoring header X-Firebase-Locale because its value was null. D/FirebaseAuth(17181): Notifying id token listeners about user ( fTnXUNwmPUajE9ybOeP3GLW0e392 ). D/FirebaseAuth(17181): Notifying auth state listeners about user ( fTnXUNwmPUajE9ybOeP3GLW0e392 ). W/DynamiteModule(17181): Local module descriptor class for com.google.android.gms.providerinstaller.dynamite not found. I/DynamiteModule(17181): Considering local module com.google.android.gms.providerinstaller.dynamite:0 and remote module com.google.android.gms.providerinstaller.dynamite:0 W/ProviderInstaller(17181): Failed to load providerinstaller module: No acceptable module com.google.android.gms.providerinstaller.dynamite found. Local version is 0 and remote version is 0. W/Firestore(17181): (24.4.0) [WriteStream]: (e9a00e8) Stream closed with status: Status{code=UNAVAILABLE, description=Channel shutdownNow invoked, cause=null}. W/DynamiteModule(17181): Local module descriptor class for com.google.android.gms.providerinstaller.dynamite not found.
my auth.dart code:
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:my_app/models/user.dart';
import 'package:my_app/services/database.dart';
class AuthService {
final FirebaseAuth _auth = FirebaseAuth.instance;
// create MyUser object based on User
MyUser? _userFromFirebaseUser(User? user) {
return user != null ? MyUser(uid: user.uid) : null;
}
// auth change user stream
Stream<MyUser?> get user {
return _auth.authStateChanges().map(_userFromFirebaseUser);
}
//sign in anonymously
Future signInAnon() async {
try {
UserCredential result = await _auth.signInAnonymously();
User? user = result.user;
return _userFromFirebaseUser(user);
} catch (e) {
print(e.toString());
return null;
}
}
// sign in with email and password
Future SignInWithEmailAndPassword(String email, String password) async {
try {
UserCredential result = await _auth.signInWithEmailAndPassword(
email: email, password: password);
User? user = result.user;
return _userFromFirebaseUser(user);
} catch (e) {
print(e.toString());
return null;
}
}
// register with email and password
Future registerWithEmailAndPassword(String email, String password) async {
try {
UserCredential result = await _auth.createUserWithEmailAndPassword(
email: email, password: password);
User? user = result.user;
// create new document for the user with uid
await DatabaseService(uid: user?.uid)
.updateUserData('How do you feel', 'I am mad', 'angry');
return _userFromFirebaseUser(user);
} on FirebaseAuthException catch (e) {
print(e.toString());
return null;
}
}
// sign out
Future signOut() async {
try {
return await _auth.signOut();
} catch (e) {
print(e.toString());
return null;
}
}
}
My database.dart
import 'package:cloud_firestore/cloud_firestore.dart';
class DatabaseService {
// collection reference
final String? uid;
DatabaseService({this.uid});
final CollectionReference pollearnCollection =
FirebaseFirestore.instance.collection('Pollearn');
Future updateUserData(String question, String answer, String emotion) async {
Map<String, String> data = {
'question': question,
'answer': answer,
'emotion': emotion,
};
return await pollearnCollection.doc(uid).set(data);
}
}
I already tried the following:
turn the emulator on and off.
tried different emulator
updated google play services
turnt bluetooth off
turnt internet off and on
enabled sign in with mail and password
adding
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
I hope you guys can help me. Thanks in advance!
My goal was to avoid users getting logged out once they close and reopened the app. So, I used shared_preferences to store the user's email and password locally so, that whenever the user reopens the app I could use firebase's signInWithEmailAndPassword and provide locally stored email and password to it. I used setString() to store email password but I was able to store only email and not the password, I get the error "Password is null" How do I solve this. Did I do the code right?
Storing email and password when user registers in app
onPressed: () async {
try {
final user =
await _auth.createUserWithEmailAndPassword(
email: email, password: password);
if (user != null) {
final SharedPreferences sharedPreferences =
await SharedPreferences.getInstance();
sharedPreferences.setString(
'email',
email,
);
sharedPreferences.setString('password', password);
Get.to(() => const BorrowerList());
}
} catch (e) {
Get.snackbar('Error', e.toString(),
backgroundColor: (Colors.red));
}
},
fetching email password and login after reopening.
#override
void initState() {
super.initState();
validateUserAuth();
}
final _firestore = FirebaseFirestore.instance;
void validateUserAuth() async {
final SharedPreferences sharedPreferences =
await SharedPreferences.getInstance();
var obtainedEmail = sharedPreferences.getString('email');
var obtainedPassword = sharedPreferences.getString('password');
if (obtainedEmail != null || obtainedPassword != null) {
setState(() {
loggedinUserEmail = obtainedEmail!;
loggedinUserPassword = obtainedPassword!;
});
if (loggedinUserEmail != null || loggedinUserPassword != null) {
final loggedinuser = await auth.signInWithEmailAndPassword(
email: loggedinUserEmail, password: obtainedPassword!);
if (loggedinuser != null) {
Get.to(() => const BorrowerList());
}
}
} else {
Get.to(() => AuthScreen());
}
}
The error is apparent.
You can't save a null value in shared_preferences.
Your code is not complete. somehow your password variable is null.
You can paste complete code so we can help you better
Can you provide more information about the project? So far, it's obvious that you're trying to store a null value in shared_preferences. You can't do that. I'm pretty sure the problem is that when the user enters a password, it's not stored in the password variable here:
try {
final user =
await _auth.createUserWithEmailAndPassword(
email: email, password: password);
if (user != null) {
final SharedPreferences sharedPreferences =
await SharedPreferences.getInstance();
sharedPreferences.setString(
'email',
email,
);
// NULLABLE VARIABLE!
sharedPreferences.setString('password', password);
Get.to(() => const BorrowerList());
}
} catch (e) {
Get.snackbar('Error', e.toString(),
backgroundColor: (Colors.red));
}
},
Additionally, it is not recommended to use shared_preferences for storing sensitive data. Flutter Secure Storage is much better suited for this.
The following documentation on deleting a user does not work:
try {
await FirebaseAuth.instance.currentUser.delete();
} catch on FirebaseAuthException (e) {
if (e.code == 'requires-recent-login') {
print('The user must reauthenticate before this operation can be executed.');
}
}
"delete()" is not a function recognized by Flutter. "FirebaseAuthException" is also not recognized by Flutter.
How do I delete a user? Where do I find this information?
Using flutter, if you want to delete firebase accounts together with the associated firestore user collection document, the following method works fine. (documents in user collection named by the firebase uid).
Database Class
class DatabaseService {
final String uid;
DatabaseService({this.uid});
final CollectionReference userCollection =
Firestore.instance.collection('users');
Future deleteuser() {
return userCollection.document(uid).delete();
}
}
Use Firebase version 0.15.0 or above otherwise, Firebase reauthenticateWithCredential() method throw an error like { noSuchMethod: was called on null }.
Authentication Class
class AuthService {
final FirebaseAuth _auth = FirebaseAuth.instance;
Future deleteUser(String email, String password) async {
try {
FirebaseUser user = await _auth.currentUser();
AuthCredential credentials =
EmailAuthProvider.getCredential(email: email, password: password);
print(user);
AuthResult result = await user.reauthenticateWithCredential(credentials);
await DatabaseService(uid: result.user.uid)
.deleteuser(); // called from database class
await result.user.delete();
return true;
} catch (e) {
print(e.toString());
return null;
}
}
}
Then use the following code inside the clickable event of a flutter widget tree to achieve the goal:
onTap: () async {
await AuthService().deleteUser(email, password);
}
I am trying to create a user in Firebase using Flutter, but when tried to send email and password the app crashes.
and this is the code snippet:
void validateAndSubmit() async {
if (validateAndSave()) {
try {
if (_formType == FormType.login) {
AuthResult result = await FirebaseAuth.instance.createUserWithEmailAndPassword(email:_email ,
password: _password);
FirebaseUser user = result.user;
print('Login page');
print('UID is : ${user.uid}');
} else {
AuthResult result = await FirebaseAuth.instance.createUserWithEmailAndPassword(email: _email ,
password: _password);
FirebaseUser user = result.user;
print('Register Page');
print('UID is : ${user.uid}');
}
} catch (e) {
print('Error: $e');
}
}
}
You shouldn't create a new user when you're logging in!
Just call signInWithEmailAndPassword(email: _email, password: _password) which returns an AuthResult object.