With two-factor authentication enabled, you will not be able to access your account without access to Google Authenticator app. For your protection, we also offer 5 back-up tokens that you can use instead of Google Authenticator when you don’t have access to your phone. However, you would need to save those tokens somewhere safe and easily accessible ahead of time. You can find those tokens under Account security tab (MY ACCOUNT > MY PROFILE > Account security).
When you try to log in, use one of the tokens instead of Google Authenticator code.