How to make flexible registration with devise?

Question

Ruby on Rails

In general, a user (not logged in) creates a post, and when sent, he receives a confer on the mail. After confirmation, the post is published, and an email with a password is sent to the new user, this is how we would like.
In fact, after filling in all the fields (including the user's email), there is a redirect to devise/session/new.html. For some reason, it seems that the session would be more logical if it were opened after confirmation.
Tell me how session_controller should behave for such an implementation?