Google Authenticator 2FA TroubleshootingThe One Time Password is an additional layer of security for your account. You will need it the first time you set up your account, and it will come in an email. 

Once your account is set up, you won't receive additional OTPs by email. Instead, you will use a different type of OTP, called a two-factor authentication (2FA) code which is generated by an authenticator app on your mobile device. 

For One Time Password (OTP) problems, please see this article

For Two-Factor Authentication problems, please see this article.