Disable the simultaneous session in the expiration period

[Naveen Kumar]

i am working on a project where i want to disable simultaneous user login for same user . currently it is there in web2py version 

2.16.1-stable+timestamp.2017.11.14.05.54.25)

i also want to delete or expire previous session , when user again login with the same user (of which he login priviously).

please suggest some ideas

[Lisandro]

In this thread you will find an interesting conversation about preventing multiple sessions from the same user:

https://groups.google.com/forum/#!searchin/web2py/multiple$20login%7Csort:date/web2py/Zz6zvYav4Sw/2xHJ8loVBgAJ

I use the approach suggested by Massimo: "when a user first logs in, store a uuid in the session and write it in the database (in a new custom field in the auth_user table). When a request arrives if the uuid in the session does not match the uuid in the database call auth.logout()"