For login use library card number. You can find it under the barcode on you library card.
You can get a PIN-code using the "Forgot your PIN code?" functionality.
Library services, that are enabled by a library card, can automatically be accessed with the account when logging in with library card information.
When you log in using your library card, the service will store the library card number and PIN code as well as your name, email address and home library.
When you log in using your email address, the service will store your name, email address and home library.
Read more about management of personal information on the Data protection page.