在stackflow爬了很久還是遲遲找不到答案，基本確定是firebase這段程式碼的問題了，後台有enable auth服務，再麻煩大大了=>
try {
UserCredential userCredential = await FirebaseAuth.instance
.signInWithEmailAndPassword(email: email, password: password);
if (_formKey.currentState!.validate()) {
Navigator.pushNamed(context, LoginSuccessScreen.routeName);
}
} catch (e) {
print(e.toString());
}
報錯=>
W/System ( 3494): Ignoring header X-Firebase-Locale because its value was null.
I/flutter ( 3494): [firebase_auth/unknown] com.google.firebase.FirebaseException: An internal error has occurred.
[ Cleartext HTTP traffic to 10.0.2.2 not permitted ]