add worker (user) session variables
vsoch opened this issue · comments
in addition to an ID, we should add the following variables:
- last_visit: should correspond to the datetime when the user participated in an experiment last
- visit_count: should correspond to the total number of times the user came to start an experiment (may not correspond with total number of experiments if an experiment is started multiple times)
- session_count: the number of visit sessions, where a session is defined as some specified amount of time over the last_visit (likely an hour or two).