Registar the User Implicitly

registration.rb

  def register_user 
    password = User.send(:generate_token, 'encrypted_password').slice(0, 6)
    user = User.create!(:name => name, :email => email, :age => age, 
                            :password => password, :password_confirmation => password)
    Notifications.signup(user, password).deliver
    self.user = user
    self.save!
  end