You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: discourse_sso_controller.rb
    path of file: ./repos/openfoodnetwork/app/controllers
    
    the code of the file until where you have to start completion: # frozen_s
    
  def sso
    if spree_current_user
      begin
        redirect_to sso_url
      rescue TypeError
        render plain: "Bad SingleSignOn request.", status: :bad_request
      end