[web2py] impersonate any user

[kuokon]

Hi,

Is there way to specific a permission that allow admin/root to
impersonate any user, instead of just a single user id?

       eg.
               has_permission('impersonate',
'auth_user')                  # any user
       instead of
               has_permission('impersonate', 'auth_user', user_id)

thanks.