An option to hide username in signup view

[saltukalakus]

Added an option named signUpHideUsernameField to hide username in signup view for the connections that have user name enabled.

Changes

This is the second time I came across this request. Customers have custom DBs and some of the users use the username to log in. Going forward the customers want to enable signup only with an email so they want to hide the username option from the signup view. Customers can't simply disable the user name option from the connections setting due to the legacy users using a username.

The solution hides the signup field with a feature option which is by default turned off. Once the option is enabled it helps to hide the username from Signup.

The solution is coded such that once the feature is enabled a random username is created with the allowed max length and passed to signup API. That is needed because, for the connections that have the username option turned on, passing the username is obligatory.

I will open a request to the doc team when the PR is merged.

References

• support ticket (internal)
  https://support.auth0.com/tickets/00473546

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]

Looks good @saltukalakus, thanks.

Just one thing to add; can you add this option into the readme (probably under "database options") that lists the parameter with an appropriate description?

Thanks

[saltukalakus]

👋 @stevehobbsdev thank you. I have just updated the README file.