We unfortunately no longer support Linkedin OAuth. If you previously enabled Linkedin OAuth, you will need to establish a password for your account to access Codecademy.
You can request a password by navigating to Reset Password and inputting the existing email address linked to your account. A password reset link will be sent to your email inbox. Follow that link to establish a password for your account.
If you run into issues establishing your password, please use the Contact Us button to speak with the customer support team. We can walk you through it.