new.html.erb

<h1 id="page_title">Login</h1>

<%= render 'form' %>

<%= link_to 'Back', homepage_url %>

user_session_controller.rb

class UserSessionsController < ApplicationController

  # GET /user_sessions/new
  def new
    @user_session = UserSession.new
  end

  # POST /user_sessions
  def create
    @user_session = UserSession.new(params[:user_session])

    if @user_session.save
      redirect_to(homepage_url, :notice => 'Login Successful')
    else
      render :action => "new" 
    end
  end

  # DELETE /user_sessions/1
  def destroy
    @user_session = UserSession.find
    @user_session.destroy

    redirect_to(homepage_url, :notice => 'Goodbye!')
  end
end