User registeration and submit information

Hello All,

I have create web base form to submit information, but I do not want
anyone submit I would like user first register and login via his email
& password then he can submit the information via the form and update/
delete/new.

Could you please help me?

Yours,
Waleed.

http://svn.techno-weenie.net/projects/plugins/restful_authentication/

and/or

http://wiki.rubyonrails.org/rails/pages/Authentication

-faisal

Thanks a lot.