Current Server Discovery and Monitoring Engine is Deprecated

When building connection using mongoose you might get an error saying Current server discovery and monitoring engine is deprecated. 

Error: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.

So, basically two of the options need to be passed to the mongoose.connect method. 

so these are:{ useNewUrlParser: true} and {useUnifiedTopology: true}

See the example below:

mongoose.connect("mongodb://localhost:27017/fruitsDB", {

  useNewUrlParser: true,

  useUnifiedTopology: true,

});

Here, fruitsDB is the database name. Now, if you run your file say for example app.js, you will not that error again.