Why My Update Email is not WORKING, Firebase and Flutter? - firebase

Question

I want to build a function that update the user email in firebase so this is what I did:
1- checked if there is internet.
2- do user.updateEmail with the email I got from firestore after I uploaded it in the sign Up and It can't be null because I used it down and it also prints the error :
NoSuchMethodError: The method 'updateEmail' was called on null.
I/flutter ( 9769): Receiver: null
I/flutter ( 9769): Tried calling: updateEmail("omarkaram1st#gmail.com")
see It got the email but somehow it can't send an email;
Code :
switchAccount() async {
try {
final user = await _auth.currentUser();
final result = await InternetAddress.lookup('google.com');
try {
if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {
user.updateEmail(email);
AwesomeDialog(
btnOkText: 'Ok',
context: context,
headerAnimationLoop: false,
dialogType: DialogType.INFO,
animType: AnimType.BOTTOMSLIDE,
title: 'Info',
desc: 'A Reset Email Has Been Sent To $email',
btnOkOnPress: () {},
)..show();
}
} catch (e) {
print(e);
}
} on SocketException catch (_) {
AwesomeDialog(
btnOkText: 'Retry',
context: context,
headerAnimationLoop: false,
dialogType: DialogType.ERROR,
animType: AnimType.BOTTOMSLIDE,
title: 'Error',
desc:
'Make Sure That You Have an Internet Connection Before Pressing Retry',
btnOkOnPress: () =>
Navigator.pushReplacementNamed(context, '/HomePage'),
)..show();
}
}

Answer 1

It looks like user is null in your call to user.updateEmail(email). We can't say why that is from the code you shared, but the quick way to prevent the error is to check for null after calling await _auth.currentUser().
final user = await _auth.currentUser();
if (user != null) {
final result = await InternetAddress.lookup('google.com');
try {
if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {
user.updateEmail(email);
...
}
} catch (e) {
print(e);
}
}
else {
... do something relevant when no user is signed in
}