Using a two-factor authentication recovery code
Use one of your recovery codes to automatically regain entry into your account. You may have saved your recovery codes to a password manager or your computer's downloads folder. The default filename for recovery codes is github-recovery-codes.txt. For more information about recovery codes, see "Configuring two-factor authentication recovery methods."
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Type your username and password to prompt authentication.
Warning: If you protect your personal account with two-factor authentication but do not know your password, you will not be able to follow these steps to recover your account. GitHub can send a password reset email to a verified address associated with your account. For more information, see "Updating your GitHub access credentials."
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Under "Having problems?", click Use a recovery code.
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Type one of your recovery codes, then click Verify.
Authenticating with a security key
If you configured two-factor authentication using a security key, you can use your security key as a secondary authentication method to automatically regain access to your account. For more information, see "Configuring two-factor authentication."