Enable 2FA
Open 2FA settings
Go to /settings/two-factor.
Scan setup QR
Use an authenticator app (for example, Google Authenticator/Authy), then enter the 6-digit code.
Optional: trust this device
You can mark the device as trusted for a limited period after activation.
Disable 2FA
Return to the same page and use Disable 2FA if you need to remove it.
If you lose access to your authenticator app, recovery may require additional verification.