According to the LSU document (Link), the following cookie policy applies to this system.
A cookie is a small text document with a unique identification number that is transmitted from a website to the hard drive of a visitor's computer so that the website administrator (information system) can identify the visitor's computer and see the visitor's online activity.
The information system of the Lithuanian Sports University https://is.lsu.lt uses one cookie from the is.lsu.lt system which is used to save (store) a user's login to the system after they have logged in, until they log out themselves or the cookie expires. This cookie is necessary for logged-in users to use the LSU information system.
ci_session - Used to store the session of the logged-in user. Valid for 9 hours.