We're exploring login data and I am curious what the difference is between last_login and last_request from the pseudonym_dim table. There are some big gaps in the dates sometimes (e.g. last_login = April 11, 2016 while last_request = May 7, 2016 for a given pseudonym). Does this indicate that a user logged in on April 11th and somehow managed to keep an active session going for several weeks, with the most recent activity on May 7th? Or am I way off base here? Any guidance on how to interpret login/user/pseudonym data would be great. Thanks!