mgo

// Database connection
// -------------------
err := Open("host", 10, "username", "password", "name", uint64(50), 10*time.Second, 10*time.Second, 10*time.Second)
if err != nil {
	log.Fatalf("Database connection failed: %v\n", err)
}
defer func() {
	if err = DBInstance.Client.Disconnect(DBInstance.Context); err != nil {
		log.Fatalf("Database disconnection failed: %v\n", err)
	}
}()

// Usage
// -----
type User struct {
	ID        primitive.ObjectID `json:"id" bson:"_id,omitempty"`
	Lastname  string             `json:"lastname"`
	Firstname string             `json:"firstname"`
	Email     string             `json:"email"`
	Password  string             `json:"password,omitempty"`
	CreatedAt time.Time          `json:"createdAt" bson:"created_at"`
}

users := make([]User, 0)
col := DBInstance.Database.Collection("users")
ctx, cancel := context.WithTimeout(context.Background(), DBInstance.QueryTimeout)
options := options.Find().SetSort(bson.D{primitive.E{Key: "created_at", Value: -1}})
filter := bson.D{}
cur, err := col.Find(ctx, filter, options)
if err != nil {
	cancel()
}
defer cur.Close(context.Background())

for cur.Next(context.Background()) {
	var user User

	err := cur.Decode(&user)
	if err != nil {
		continue
	}

	user.Password = ""

	users = append(users, user)
}

cancel()
fmt.Printf("Users: %v\n", users)

Output: