Beginner Issue with Mongoose and MongoDB - node.js

Question

I'm new to Node, along with Mongoose and MongoDB. I'm trying to test inserting data into one of the collections in a database on MongoDB Atlas. However, the code somehow inserts the data into the wrong database. I intend to insert data into the 'test' collection in the 'quizzard' database. However, a new collection called 'tests' was created within quizzard where the data was placed. When I tried it again, it started inserting data into another database called 'test' and created a collection called 'tests', where the data is still being placed.
var link = "mongodb+srv://<user>:<password>#quizzard-dp0b2.mongodb.net/test?retryWrites=true&w=majority";
// changed to <user> and <password> for privacy reasons
mongoose.connect(link, {
useNewUrlParser: true,
useUnifiedTopology: true
});
mongoose.connection.on('connected', () => {
console.log('Connected');
});
const Schema = mongoose.Schema;
const TestSchema = new Schema({
_id: Number,
data: String
});
//TestSchema.set('database', 'test');
//TestSchema.set('collection', 'test');
const Test = mongoose.model('Test', TestSchema);
const data = {
_id: 11,
data: "why???"
};
const newTest = new Test(data);
newTest.save((error) => {
if(error){
console.log("An error has occured");
} else {
console.log("Action performed");
}
});

Answer 1

You need to change the link; after the first slash, you choose which DB you want to use.
Examples
// DB NAME youinsertinheredbname
var link = "mongodb+srv://<user>:<password>#quizzard-dp0b2.mongodb.net/youinsertinheredbname?retryWrites=true&w=majority";
// DB NAME stackoverflow
var link = "mongodb+srv://<user>:<password>#quizzard-dp0b2.mongodb.net/stackoverflow?retryWrites=true&w=majority";