auth/invalid-credential
ماذا يعني خطأ Firebase (خدمات Google) هذا
كيف يظهر
FirebaseError: Firebase: Error (auth/invalid-credential).
ماذا يعني
The sign-in details were not accepted. For email and password sign-in, Firebase returns this code for a wrong email or password when email enumeration protection is on.
السبب المعتاد في تطبيق مبني بالذكاء الاصطناعي
Often the person first signed up with Google, so the account has no password, and the AI-built login form tries an email and password sign-in that can never match.
افحص هذا أولًا
In the Firebase console, find the email under Authentication, Users and check which sign-in providers the account has.