[web2py] How to link @auth.requires_login() to custom login view?

[Constantine Vasil]

I am using in a custom made login function:

def signin():    
    ....
    form=current.app.auth.login(next=login_next)
   ....

Now I want to add @auth.requires_login() to my other functions.

The question is how to link @auth.requires_login() to my function 'signin'?