[web2py] CAS auto login for all apps

[Cahya Dewanta]

This is my 7th day using web2py. I have my CAS working properly. But I
have to manually login with same username to each app. Is this normal?
How to make it automatically once login for all? All apps are on the
same domain. Actually I haven't set anything or change any code. The
new web2py did it for me. What setting I have to append? Thank you.