How to catch a Firebase Auth specific exceptions

Question

Using Firebase, how do I catch a specific exception and tell the user gracefully about it? E.g :

FirebaseAuthInvalidCredentialsException: The email ad

Answer 1

LOGIN_EXCEPTIONS

FirebaseAuthException - Generic exception related to Firebase Authentication. Check the error code and message for more details.

ERROR_USER_DISABLED if the user has been disabled (for example, in the Firebase console)

ERROR_USER_NOT_FOUND if the user has been deleted (for example, in the Firebase console, or in another instance of this app)

ERROR_USER_TOKEN_EXPIRED if the user's token has been revoked in the backend. This happens automatically if the user's credentials change in another device (for example, on a password change event).

ERROR_INVALID_USER_TOKEN if the user's token is malformed. This should not happen under normal circumstances.

mAuth.signInWithEmailAndPassword(login, pass)
  .addOnCompleteListener(this, new OnCompleteListener() {
        @Override
        public void onComplete(@NonNull Task task) {
          if(task.isSuccessful())
            {

            }else if (task.getException() instanceof FirebaseAuthInvalidUserException) {

            }else if(((FirebaseAuthException) task.getException()).getErrorCode().equals("ERROR_USER_DISABLED"))
            {

           }else if(((FirebaseAuthException) task.getException()).getErrorCode().equals("ERROR_USER_NOT_FOUND "))
          {

          }else if(((FirebaseAuthException) task.getException()).getErrorCode().equals("ERROR_USER_TOKEN_EXPIRED "))
         {

         }else if(((FirebaseAuthException) task.getException()).getErrorCode().equals("ERROR_INVALID_USER_TOKEN "))
         {
         }
 }
});

REGISTER_EXCEPTIONS

FirebaseAuthEmailException

Represents the exception which is a result of an attempt to send an email via Firebase Auth (e.g. a password reset email)

FirebaseAuthInvalidCredentialsException - Thrown when one or more of the credentials passed to a method fail to identify and/or authenticate the user subject of that operation. Inspect the error code and message to find out the specific cause.

FirebaseAuthWeakPasswordException - Thrown when using a weak password (less than 6 chars) to create a new account or to update an existing account's password. Use getReason() to get a message with the reason the validation failed that you can display to your users.