once in a project i need to do the following tasks in CakePHP 3:

I was using database sessions to accomplish that. and want to save additional data in sessions table.So below is the solution :

The session database model is a cake model like all the other models, which means you can interact with it, in the same way, by adding new columns to that table and/or deleting sessions if needed. Use the model object to update delete entities in that table (talking about cakephp 3.x)

Limiting the number of sessions to one per user can be tricky as sessions are created even if a user is not logged in. So you will have “user-less” sessions in your database as well.

Suggested way to tackle this