session expires earlier on community auth

 

Good day skunk, where can i find the procedures that add and view session data from mysql database. all i can see is....

Code:

__ci_last_regenerate|i:1518568247;auth_identifiers|s:83:"a:2:{s:7:"user_id";s:10:"1307276232";s:10:"login_time";s:19:"2018-02-14 01:30:47";}";

i wish to add username and user's name..