```ruby
module Clearance
  module SessionsController

    def self.included(base)
      base.class_eval do
        skip_before_filter :authenticate
        protect_from_forgery :except => :create
        filter_parameter_logging :password
        
        include InstanceMethods
        
      protected
        include ProtectedInstanceMethods
      end
    end
    
    module InstanceMethods
      def create
        remember_me = params[:session][:remember_me] if params[:session]
        login_via_password(params[:session][:email], params[:session][:password], remember_me)
      end

      def destroy
        forget current_user
        reset_session
        flash[:notice] = 'You have been logged out.'
        redirect_to login_url
      end
    end

    module ProtectedInstanceMethods
      def login_via_password(email, password, remember_me)
        user = User.authenticate(email, password)
        if login(user)
          remember(user) if remember_me == '1'
          login_successful
        else
          login_failure
        end
      end
      
      def login_successful
        flash[:notice] = 'Logged in successfully'
        redirect_back_or root_url
      end

      def login_failure(message = "Bad email or password.")
        flash.now[:notice] = message
        render :action => :new
      end
      
      def remember(user)
        user.remember_me!
        cookies[:auth_token] = { :value   => user.remember_token, 
                                 :expires => user.remember_token_expires_at }
      end

      def forget(user)
        user.forget_me! if user
        cookies.delete :auth_token
      end
    end

  end
end
```

Create session for user when logging in.
user
```ruby
module Clearance
  module SessionsController

    def self.included(base)
      base.class_eval do
        skip_before_filter :authenticate
        protect_from_forgery :except => :create
        filter_parameter_logging :password
        
        include InstanceMethods
        
      protected
        include ProtectedInstanceMethods
      end
    end
    
    module InstanceMethods
      def create
        remember_me = params[:session][:remember_me] if params[:session]
        login_via_password(params[:session][:email], params[:session][:password], remember_me)
      end

      def destroy
        forget current_user
        reset_session
        flash[:notice] = 'You have been logged out.'
        redirect_to login_url
      end
    end

    module ProtectedInstanceMethods
      def login_via_password(email, password, remember_me)
        user = User.authenticate(email, password)
        if login(user)
          create_session_for(user)
          remember(user) if remember_me == '1'
          login_successful
        else
          login_failure
        end
      end
      
      def login_successful
        flash[:notice] = 'Logged in successfully'
        redirect_back_or root_url
      end

      def login_failure(message = "Bad email or password.")
        flash.now[:notice] = message
        render :action => :new
      end
      
      def remember(user)
        user.remember_me!
        cookies[:auth_token] = { :value   => user.remember_token, 
                                 :expires => user.remember_token_expires_at }
      end

      def forget(user)
        user.forget_me! if user
        cookies.delete :auth_token
      end
    end

  end
end
```
assistant