Always login with Diak's credentials (short user ID, e.g. c12345) . On first login go to My account > Library cards > Connect library card. Add the library card you use at Diak libray to your account. Now you can use library services that are enabled by the card. Also set a due date reminder in Profile. Check the Help & Instructions -link for more detailed instructions.
Username is the barcode number on the library card you use at Diak library. For a new Finna user, give your last name as password, if you have not previously set a PIN code.
Library services, that are enabled by a library card, can automatically be accessed with the account.