Does each user need to re-authenticate on the HE website every time they want to read?
Your institutional affilliation should be detected automatically, if facilitated by IP range authentication. If you are logging in via Shibboleth, the user can optionally retain authentication for a week, but otherwise must re-authenticate on each new browser session.
Your individual username/password on Higher Education from Cambridge University press can be stored for up to 30 days, if you select the 'Remember me' option when logging in.