Two-Factor Authentication is an extra security step you would need to complete to be able to log into your account. This security feature is mandatory on all accounts. 

If you do not have Two-Factor Authentication enabled, you will be unable to perform certain actions on your account.

You can disable 2FA by:

Going to the Settings tab.

Click the Toggle button to disable your 2FA.

Enter the 6-digit code sent to your device and click on Disable 2FA.