docs: function morganMongoMiddleware(options = {}, connectionOptions = {}, schemaOptions = {}, morganOptions = {}) {
      const morganMongo = new MorganMongo(options, connectionOptions, schemaOptions);
      return morgan((tokens, req, res) => {
          try {
              const logEntry = morganMongo.prepareLogEntry(tokens, req, res);
              morganMongo.persistLogEntry(logEntry);
          }
          catch (e) {
              console.log(e);
          }
          return '';
      }, morganOptions);
  }