rspec errors... Failure/Error: get 'create' NoMethodError: undefined method `include?' for nil:NilClass

gistfile1.rb

#app/controllers/sessions.rb
  def create
  @login = params[:login]

    
  	#user = User.find__by_email_or_mobile(params[:login])
  	if @login.include?("@") 
  	user = User.find_by_email(@login.downcase)
  	else
  	user = User.find_by_mobile(@login.gsub(/\D/, '').gsub(/^(1|0)+/,''))
  	end

    if user && user.authenticate(params[:password])
      #session[:user_id] = user.id
      if params[:remember_me]
        cookies.permanent[:auth_token] = user.auth_token
      else
      	cookies[:auth_token] = user.auth_token
      end
      
      redirect_to root_url, :notice => "Logged in!"
    else
      flash.now.alert = "Invalid email or password"
      render "new"
    end
  end
  
  #sessions_controller_spec.rb
  
  describe "GET 'create'" do
    it "returns http success" do
      get 'create'
      response.should redirect_to(root_url)
    end
  end

test