# File lib/base_object.rb, line 79
      def add_authentication!(auth_type, values=[])
        value = { :key => (values/'login/keyname').text.strip } if auth_type == 'key'
        if auth_type == 'password'
          value = {
            :username => (values/'login/username').text.strip,
            :username => (values/'login/password').text.strip
          }
        end
        @objects << {
          :type => :collection,
          :method_name => 'authentication',
          :values => value
        }
      end