Configuration of the MongoDB Connection

configDB.go

func configDB(ctx context.Context) (*mongo.Database, error) {
	uri := fmt.Sprintf(`mongodb://%s:%s@%s/%s`,
		ctx.Value(usernameKey).(string),
		ctx.Value(passwordKey).(string),
		ctx.Value(hostKey).(string),
		ctx.Value(databaseKey).(string),
	)
	client, err := mongo.NewClient(options.Client().ApplyURI(uri))
	if err != nil {
		return nil, fmt.Errorf("todo: couldn't connect to mongo: %v", err)
	}
	err = client.Connect(ctx)
	if err != nil {
		return nil, fmt.Errorf("todo: mongo client couldn't connect with background context: %v", err)
	}
	todoDB := client.Database("todo")
	return todoDB, nil
}