I’d like to request a default value option for the Username field when creating a new login.
For many users, most accounts use the same email address as the username, so re-entering it every time creates unnecessary friction.
A simple implementation would be to add a single setting, disabled by default, where the user can define a default email address or username. This could apply only when manually adding a new login entry, with the Username field prefilled automatically.
This would keep the feature optional for users who do not want it, while making a very common workflow much faster for those who do.
This would support a common workflow that is distinct from alias generation.