Accesslog functionality? Accesslog was removed from the Statistics module in Drupal 8: https://www.drupal.org/node/1446956. Does this functionality now exist somewhere else in core?
As reported in Accesslog removed from the Statistics module, the module with that functionality is the Better Statistics module, which (at the moment I am writing this answer) doesn't have a Drupal 8 version.


  The accesslog and all associated reports have been removed from the core Statistics module. This functionality exists in contrib at http://drupal.org/project/better_statistics.


There is a issue open for porting the module to Drupal 8, Port Better Statistics to Drupal 8, which was created after the change record. 

The History module in Drupal core doesn't keep a log for the access to all the pages, but it keeps a log for the access to nodes. If you are interesting just to the users who accessed a node, that could help you.