Answers for "DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version"

DeprecationWarning: current Server Discovery and Monitoring engine is deprecated,

mongoose.connect("paste db link", {useUnifiedTopology: true, useNewUrlParser: true, useCreateIndex: true });

DeprecationWarning: current Server Discovery and Monitoring engine is deprecated,

mongoose.connect(uri, { useNewUrlParser: true,useUnifiedTopology:true });
mongoose.createConnection(uri, { useNewUrlParser: true });