[web2py] auth.login() suggested enhancement

[weheh]

I'm wondering why auth.login() doesn't take many of the same arguments
that SQLFORM takes (same goes for other auto-form-generators within
web2py)? For instance, why not take the separator, buttons,
formstyle ... arguments? Seems like they should work nicely within the
framework of auth.login() and give one more control from css without
having to build a custom form.