The Authy API has been updated to allow two-factor authentication (2FA) to be implemented on websites without requiring users to provide their phone number. This change removes the need for websites to collect and share personal information, increasing user privacy. The new method uses a QR code that contains unique data tied to the user's Authy account but not personally identifiable, allowing users to enable 2FA without sharing sensitive information. With this update, developers can now implement 2FA on their websites without collecting or sharing phone numbers, providing a more private and secure authentication experience for users.