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After successfully adding a two-factor authentication method to your account, you will see a success message. This page will give you the option to include additional two-factor authentication methods. This additional method can be use in the event that you loose lose access to your first method.
For example, if you chose “Authentication app” as your first method, and “Backup codes” as your second method, you can use your backup codes to sign in if your phone is lost or stolen.
This step is optional, but recommended, as you cannot login if you loose access to your primary two-factor authentication method.
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