MongoDB Connection Error with Angular app

I got this error while running my angular app and I wasn't able to connect with database.

will share after I come up solution(s)

servers = [{

address = IP_ADDRESS_HERE,

type = UNKNOWN,

state = CONNECTING,

exception = {

com.mongodb.MongoSocketOpenException: Exception opening socket

},

caused by {

java.net.ConnectException: Connection refused(Connection refused)

}

}]