Better flash error messages on incorrect, empty fields.

[saltukalakus]

Changes

1- Password field in signup view was showing the invalid flash password error when the field was blank. This commit fixes this by showing the password field as blank in that condition.

2- Our blank and invalid messages are same for all the fields. By adding new translations it is now possible to configure different messages. This is implemented in a backwards compatible way.

References

This was raised in a support ticket.

Testing

Please describe how this can be tested by reviewers. Be specific about anything not tested and reasons why. If this library has unit and/or integration testing, tests should be added for new functionality and existing tests should complete without errors.

• This change adds unit test coverage
• This change adds integration test coverage
• This change has been tested on the latest version of the platform/language

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All existing and new tests complete without errors
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled
• All active GitHub checks have passed

[stevehobbsdev]

@saltukalakus If this is a WIP, could you please convert the PR into a draft until it is time to review. Thanks.

[saltukalakus]

👋 @stevehobbsdev this one is ready for review.

With yarn dev you may not run it correctly, as the language file comes from the CDN. I have tested the changes with yarn build and inserting lock and language files in the universal login HTML for that reason.

[stevehobbsdev]

Thanks!