Hello,
It would be a useful to be able to read existing filled username/password fields from a website when creating a new login.
Using iOS as an example: iOS/Safari has a built in autofill feature that makes it easy to automatically fill a saved email into the username field on a website with no Bitwarden context. From there, a user would choose to create a saved login in Bitwarden, but when the login creation form is shown, the existing iOS autofilled email/username is not read and populated into the creation form. This means the user needs to enter the already-autofilled email into Bitwarden, duplicating efforts.
This feature would be helpful in general if a user has started filling out the signup page (autofill or manual) and then decides (or remembers) to create a corresponding Bitwarden login.
This is different from a previously requested feature for default username autofill on new login creation: Autocomplete default username (+random password) when creating new entries (or option in generator). This feature uses previously filled username/password fields by default when creating new logins, and if implemented and enabled, would override any default username settings.
