# File lib/picnic.rb, line 77
      def authenticate_using(mod)
        load "picnic/authentication.rb"
        mod = self::Authentication.const_get(mod.to_s.camelize) unless mod.kind_of? Module
        
        $LOG.info("Enabling authentication for all requests using #{mod.inspect}.")
        
        module_eval do
          include mod
        end
      end