title: Codeigniter 3 + Tank auth throws error: Unknown column 'data' in 'field list'
body: <p>Can you help me please with authentication in Codeigniter? I start with CI yesterday so I am little confused.
  I found <a href="https://konyukhov.com/soft/tank_auth/" rel="nofollow">Tank auth library</a>, but it seems it is not compatible with CI3. It throws me an error: "Unknown column 'data' in 'field list'" from libraries/Session/drivers/Session_database_driver.php 
  Session library expects the field name data in ci_session table. My ci_session table comes from Tank auth download and there is user_data field instead. What can I do? Or is there a better authentication library for CI3? I wolud like to find lib with authentication + authorisation. </p>