hackinf0

Explanation file: db.js
This code imports the mongoose library which allows to connect to a MongoDB database. 
There are two URIs defined to connect to two different databases: MONGO_URI and MOBILE_URI.  
Each URI contains connection information to a remote MongoDB database, including user credentials.

 The connectDBs function uses the mongoose.createConnection method to create connections to these two 
 databases using the respective URIs.  The useUnifiedTopology and useNewUrlParser options are set to enable the new 
 unified topology policy and use MongoDB's new URL parser, respectively.

 The function returns an object that contains the connections to these two databases as qrCodeDb and userDB properties.

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