The service known as BoilerKey was retired in June 2023. Purdue's new two-factor authentication login process continues to use the Duo Mobile app for authentication or a hard token for users without access to a smart phone.
To log in, users should use their Purdue career account user name and password.
For additional details, see https://it.purdue.edu/login/ or "How to use Duo authentication with Purdue Login."