Here is the summary of the text in a neutral and interesting tone: Implementing two-factor authentication (2FA) with Symfony and Twilio's Authy App and API adds an extra layer of security to your application. This approach uses the Authy app to generate time-based one-time passwords, which are then verified by the user before accessing sensitive areas of the application. By following this tutorial, developers can integrate 2FA into their Symfony applications, providing a more secure experience for users. The process involves creating a new user entity, adding a country code and phone number fields, and configuring the registration form to collect the necessary information. Additionally, a service class is created to handle interactions with the Authy API, including registering users and verifying one-time passwords. By using this approach, developers can enhance the security of their applications and provide a better experience for their users.