# File lib/fog/rackspace/storage.rb, line 86
        def authenticate
          if @rackspace_must_reauthenticate || @rackspace_auth_token.nil?
            options = {
              :rackspace_api_key  => @rackspace_api_key,
              :rackspace_username => @rackspace_username,
              :rackspace_auth_url => @rackspace_auth_url,
              :connection_options => @connection_options
            }
            super(options)
          else
            @auth_token = @rackspace_auth_token
            @uri = URI.parse(@rackspace_storage_url)
          end
        end