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Firebase Authentication SDK'ları,
kimlik doğrulama yöntemlerinden birini seçin. Flutter'ın SDK'ları, bu hataları FirebaseAuthException üzerinden gösterir.
sınıfını kullanır.
En azından bir code ve message sağlanır ancak bazı durumlarda e-posta adresi gibi ek özellikler
Yeterlilik Belgesi ve Yeterlilik Belgesi de verilir. Örneğin, kullanıcı bir e-posta adresi ve şifreyle oturum açmaya çalışıyorsa
bildirilen tüm hatalar açık bir şekilde yakalanabilir:
try{awaitFirebaseAuth.instance.signInWithEmailAndPassword(email:"barry.allen@example.com",password:"SuperSecretPassword!");}onFirebaseAuthExceptioncatch(e){print('Failed with error code: ${e.code}');print(e.message);}
Her yöntem, kimlik doğrulama çağrısı türüne bağlı olarak çeşitli hata kodları ve mesajları sağlar. İlgili içeriği oluşturmak için kullanılan
Referans API, her yöntemdeki hatalar hakkında güncel ayrıntılar sağlar.
Firebase Authentication kotasına ulaşırsanız too-many-requests veya operation-not-allowed gibi diğer hatalar bildirilebilir.
veya belirli bir kimlik doğrulama sağlayıcıyı etkinleştirmemiş olabilirsiniz.
Firebase konsolunda E-posta adresi başına bir hesap ayarını etkinleştirdiyseniz,
Kullanıcı, başka bir Firebase kullanıcısının sağlayıcısına ait bir e-postayla bir sağlayıcıda (ör. Google) oturum açmaya çalıştığında
(ör. Facebook), auth/account-exists-with-different-credential hatası, bir AuthCredential sınıfı (Google kimlik jetonu) ile birlikte gönderilir.
Oturum açma akışını istenen sağlayıcıya göndermek için kullanıcının önce mevcut sağlayıcıda (ör. Facebook) oturum açması ve ardından eski sağlayıcıya bağlanması gerekir
AuthCredential (Google kimliği jetonu).
FirebaseAuthauth=FirebaseAuth.instance;// Create a credential from a Google Sign-in RequestvargoogleAuthCredential=GoogleAuthProvider.credential(accessToken:'xxxx');try{// Attempt to sign in the user in with Googleawaitauth.signInWithCredential(googleAuthCredential);}onFirebaseAuthExceptioncatch(e){if(e.code=='account-exists-with-different-credential'){// The account already exists with a different credentialStringemail=e.email;AuthCredentialpendingCredential=e.credential;// Fetch a list of what sign-in methods exist for the conflicting userList<String>userSignInMethods=awaitauth.fetchSignInMethodsForEmail(email);// If the user has several sign-in methods,// the first method in the list will be the "recommended" method to use.if(userSignInMethods.first=='password'){// Prompt the user to enter their passwordStringpassword='...';// Sign the user in to their account with the passwordUserCredentialuserCredential=awaitauth.signInWithEmailAndPassword(email:email,password:password,);// Link the pending credential with the existing accountawaituserCredential.user.linkWithCredential(pendingCredential);// Success! Go back to your application flowreturngoToApplication();}// Since other providers are now external, you must now sign the user in with another// auth provider, such as Facebook.if(userSignInMethods.first=='facebook.com'){// Create a new Facebook credentialStringaccessToken=awaittriggerFacebookAuthentication();varfacebookAuthCredential=FacebookAuthProvider.credential(accessToken);// Sign the user in with the credentialUserCredentialuserCredential=awaitauth.signInWithCredential(facebookAuthCredential);// Link the pending credential with the existing accountawaituserCredential.user.linkWithCredential(pendingCredential);// Success! Go back to your application flowreturngoToApplication();}// Handle other OAuth providers...}}
[[["Anlaması kolay","easyToUnderstand","thumb-up"],["Sorunumu çözdü","solvedMyProblem","thumb-up"],["Diğer","otherUp","thumb-up"]],[["İhtiyacım olan bilgiler yok","missingTheInformationINeed","thumb-down"],["Çok karmaşık / çok fazla adım var","tooComplicatedTooManySteps","thumb-down"],["Güncel değil","outOfDate","thumb-down"],["Çeviri sorunu","translationIssue","thumb-down"],["Örnek veya kod sorunu","samplesCodeIssue","thumb-down"],["Diğer","otherDown","thumb-down"]],["Son güncelleme tarihi: 2025-07-25 UTC."],[],[],null,["# Error Handling\n\n\u003cbr /\u003e\n\nThe Firebase Authentication SDKs provide a simple way for catching the various errors which may occur which using\nauthentication methods. The SDKs for Flutter expose these errors via the `FirebaseAuthException`\nclass.\n\nAt a minimum, a `code` and `message` are provided, however in some cases additional properties such as an email address\nand credential are also provided. For example, if the user is attempting to sign in with an email and password,\nany errors thrown can be explicitly caught: \n\n try {\n await FirebaseAuth.instance.signInWithEmailAndPassword(\n email: \"barry.allen@example.com\",\n password: \"SuperSecretPassword!\"\n );\n } on FirebaseAuthException catch (e) {\n print('Failed with error code: ${e.code}');\n print(e.message);\n }\n\nEach method provides various error codes and messages depending on the type of authentication invocation type. The\n[Reference API](https://pub.dev/documentation/firebase_auth/latest/) provides up-to-date details on the errors for each method.\n\nOther errors such as `too-many-requests` or `operation-not-allowed` may be thrown if you reach the Firebase Authentication quota,\nor have not enabled a specific auth provider.\n\nHandling `account-exists-with-different-credential` Errors\n----------------------------------------------------------\n\nIf you enabled the One account per email address setting in the [Firebase console](https://console.firebase.google.com/project/_/authentication/providers),\nwhen a user tries to sign in a to a provider (such as Google) with an email that already exists for another Firebase user's provider\n(such as Facebook), the error `auth/account-exists-with-different-credential` is thrown along with an `AuthCredential` class (Google ID token).\nTo complete the sign-in flow to the intended provider, the user has to first sign in to the existing provider (e.g. Facebook) and then link to the former\n`AuthCredential` (Google ID token). \n\n FirebaseAuth auth = FirebaseAuth.instance;\n\n // Create a credential from a Google Sign-in Request\n var googleAuthCredential = GoogleAuthProvider.credential(accessToken: 'xxxx');\n\n try {\n // Attempt to sign in the user in with Google\n await auth.signInWithCredential(googleAuthCredential);\n } on FirebaseAuthException catch (e) {\n if (e.code == 'account-exists-with-different-credential') {\n // The account already exists with a different credential\n String email = e.email;\n AuthCredential pendingCredential = e.credential;\n\n // Fetch a list of what sign-in methods exist for the conflicting user\n List\u003cString\u003e userSignInMethods = await auth.fetchSignInMethodsForEmail(email);\n\n // If the user has several sign-in methods,\n // the first method in the list will be the \"recommended\" method to use.\n if (userSignInMethods.first == 'password') {\n // Prompt the user to enter their password\n String password = '...';\n\n // Sign the user in to their account with the password\n UserCredential userCredential = await auth.signInWithEmailAndPassword(\n email: email,\n password: password,\n );\n\n // Link the pending credential with the existing account\n await userCredential.user.linkWithCredential(pendingCredential);\n\n // Success! Go back to your application flow\n return goToApplication();\n }\n\n // Since other providers are now external, you must now sign the user in with another\n // auth provider, such as Facebook.\n if (userSignInMethods.first == 'facebook.com') {\n // Create a new Facebook credential\n String accessToken = await triggerFacebookAuthentication();\n var facebookAuthCredential = FacebookAuthProvider.credential(accessToken);\n\n // Sign the user in with the credential\n UserCredential userCredential = await auth.signInWithCredential(facebookAuthCredential);\n\n // Link the pending credential with the existing account\n await userCredential.user.linkWithCredential(pendingCredential);\n\n // Success! Go back to your application flow\n return goToApplication();\n }\n\n // Handle other OAuth providers...\n }\n }"]]