def signup
    return if generate_blank
    @params['user'].delete('form')
    @user = User.new(@params['user'])
    begin
      User.transaction(@user) do
        @user.new_password = true
        if @user.save
          key = @user.generate_security_token
          url = url_for(:action => 'welcome')
          url += "?user[id]=#{@user.id}&key=#{key}"
          UserNotify.deliver_signup(@user, @params['user']['password'], url)
!!          flash['notice'] = l(:user_signup_succeeded)
          redirect_to :action => 'login'
        end
      end
    rescue
      flash.now['message'] = l(:user_confirmation_email_error)
    end
  end