Customization of the 401 error message in the Keycloak authentication call response

[dasniko]

Custom User Storage Provider Message

Hello, I’m developing a custom User Storage Provider and I need to return customized messages to the user based on the validations performed. I tried throwing exceptions, but the only message the user receives is “unknown error”. Here’s an example of the code to illustrate what I’m trying to do: public class CustomUserStorageProvider implements UserStorageProvider, UserLookupProvider, CredentialInputValidator, CredentialInputUpdater { //... @Override public boolean isValid(RealmModel re…