code: function (err, body) {
            if (!err) {
              var val = body.GET
              if (val) {
                /*
                {
                  "GET": "[resource]@[id]"
                }
                */
                val = val.split('@')
                // overwrite body
                body = {
                  'resource': val[0],
                  '_id': val[1]
                }
  
                // success, pass the object
                callback(null, body)
              } else {
                // Redis key not found
                body = {
                  'status': 404,
                  'error_code': -44,
                  'message': 'Page not found, invalid slug or store ID'
                }
                var msg = body.message
                errorHandling(callback, msg, body)
              }
            } else {
              // just pass the error
              callback(err, body)
            }
          }
docs: middleware callback