ruby on rails - How to make Registration / authorization With Radiant cms -

i need regestration page . field :email username , password. , user can login on login page. how make authorization radiant cms

have @ radiant-reader-extension. there exist several other extensions (forum, reader groups, ...) building upon that.

seeing need 'front end' user class, seems project tilting towards web app (as opposed web site). if project leans in direction, may want nót use radiant due restrictions come (brings it's own rails (2.3), must extended through extensions, ...).