Please note: app-based two-factor authentication is different from authorizing a new device via email verification!
If you have previously enabled two-factor authentication, you should be able to retrieve the rotating code needed during login from your authenticator app - for most people, that would be Google Authenticator.
Our support staff will verify you as the account owner (the process differs slightly depending on if you're a user or a creator), and remove the 2FA requirement from your account. Afterwards, you will be able to log in once again.
We strongly recommend you protect your account with 2FA again as soon as possible!