Hello airbnb

hydro/service/db.js

@@ -1,19 +1,20 @@
 const Mongo = require('mongodb');
 const options = require('../options');
+
 let mongourl = 'mongodb://';
-if (options.db.username) mongourl += options.db.username + ':' + options.db.password + '@';
+if (options.db.username) mongourl += `${options.db.username}:${options.db.password}@`;
 mongourl += `${options.db.host}:${options.db.port}/${options.db.name}`;
 /**
  * @type {import('mongodb').Db}
  */
 let db = null;
 Mongo.MongoClient.connect(mongourl, { useNewUrlParser: true, useUnifiedTopology: true })
-    .then(Database => {
+    .then((Database) => {
         db = Database.db(options.db.name);
         db.Db = Database;
         global.bus.emit('connected');
     });
 
 module.exports = {
-    collection: c => db.collection(c)
+    collection: (c) => db.collection(c),
 };