1. Log in your account first. How to log in.

2. Go to personal settings by clicking on one of following links:

3. Next, choose "Settings -> Security" at the left-side menu:

4. Read all the warnings carefully and enable  2FA setting.

  1 - If you don't know how 2FA working, you can refer to wiki.

  2 - Copy your 64 digits code to safe place. It will help to restore access to your account. Then click on "DONE"

  3 - Scan QR code with Google Authenticator application, enter 6-digits code from it and click on "ENABLE 2FA"

If all above points are done, you will see the message:

5. That's it.