code: function initialize(name, accessor) {
          var consumerSecret;
          if (accessor.accessorSecret != null
              && name.length > 9
              && name.substring(name.length-9) == "-Accessor")
          {
              consumerSecret = accessor.accessorSecret;
          } else {
              consumerSecret = accessor.consumerSecret;
          }
          this.key = OAuth.percentEncode(consumerSecret)
               +"&"+ OAuth.percentEncode(accessor.tokenSecret);
      }
docs: Set the key string for signing.