You must use your active Vanderbilt email to create or register a new account in Calcbench.
You will not need a code when registering with your Vanderbilt email.
Using the Google or LinkedIn options will result in a "code expired" error message.
Additionally, please make sure to use the library link to both register and then log back in to your account:
https://researchguides.library.vanderbilt.edu/calcbench