FirebaseAuthException ([firebase_auth/user-token-expire] 用户的凭据不再有效。用户必须重新登录。

Question

我写了一个这样的代码：

TextFormField(
controller: _passwordController,
obscureText: true,
decoration: InputDecoration(
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(20),
),
),
),
// ...
FirebaseAuth.instance.currentUser!.updatePassword(_passwordController.text).then((value) {
}).catchError((e) {
ModernAlert(
context,
"Hata",
"Bir hata meydana geldi. Lütfen daha sonra tekrar deneyin.",
"Tamam",
() {},
);
});

我的目标是用TextFormField从用户那里获得新密码，并在Firebase Auth系统中更改他的密码。但我得到了这个错误：

FirebaseAuthException ([firebase_auth/user-token-expired] The user's credential is no longer valid. The user must sign in again.)

是什么原因导致了这个问题？我该如何解决？

Answer 1

此错误是因为用户Unauthentication，并读取此文档FirebaseAuthInvalidUserException

解决问题添加此功能：

Future<bool> _changePassword(String currentPassword, String newPassword) 
async {
bool success = false;
//Create an instance of the current user.
var user = await FirebaseAuth.instance.currentUser!;
//Must re-authenticate user before updating the password. Otherwise it may 
fail or user get signed out.
final cred = await EmailAuthProvider.credential(email: user.email!, 
password: currentPassword);
await user.reauthenticateWithCredential(cred).then((value) async {
await user.updatePassword(newPassword).then((_) {
success = true;
}).catchError((error) {
print(error);
});
}).catchError((err) {
print(err);
});
return success;
}