# How can I use other values than the ones provided from add_user.rhtml:
#  <%= form.password_field :password, :size => 10 %>
#  <%= form.password_field :password_confirmation, :size => 10 %>

account_controller.rb
  def add_user
    @user = User.new(params[:user])
    @user.password_confirmation = @user.password = "secreto"
    logger.debug("number is #{@user.number} password: #{@user.password}\n")
    if request.post? and @user.save
      flash.now[:notice] = "User #{@user.name} created"
      @user = User.new
    end
  end

add_user.rhtml
    <% form_for :user do |form| %>
      <p>
        <label for="user_name">Name: </label>
        <%= form.text_field :name, :size => 10 %>
      </p>
      <p>
        <label for="user_company">Company:</label>
        <%= form.text_field :company, :size => 20 %>
      </p>
      <p>
        <label for="user_phone">Mobile:</label>
        <%= form.text_field :number, :size => 8 %>
      </p>
        <label for="user_email">Email:</label>
        <%= form.text_field :email, :size => 8 %>
      </p>
        <label for="user_credit">Credit:</label>
        <%= form.text_field :credit, :size => 4 %>
      </p>
      <p>
        <label for="user_password">Password:</label>
        <%= form.password_field :password, :size => 10 %>
      </p>
      <p>
        <label for="user_password_confirmation">Confirm:</label>
        <%= form.password_field :password_confirmation, :size => 10 %>
      </p>

      <%= submit_tag "Add User", :class => "submit" %>

    <% end %>