You can enhance the security of your account by using a YubiKey, which offers greater protection compared to SMS-based two-factor authentication (2FA).

To add a security key to your account, visit the website's settings or security section, insert the YubiKey into a USB port or tap it against your phone for NFC support.

Follow the instructions provided by the website to associate the YubiKey with your account, and store the device in a safe place for future use during login.

How to use two-factor authentication
https://help.x.com/en/managing-your-account/two-factor-authentication