Trying to update a struct

update struct

type User struct {
	mogo.DocumentModel `bson:",inline" coll:"users"`
	Username           string        `json:"username" binding:"required"`
	Email              string        `idx:"{email},unique" json:"email" binding:"required"`
	Password           string        `json:"password" binding:"required"`
	FirstName          string        `json:"firstname"`
	LastName           string        `json:"lastname"`
	// CreatedAt          *time.Time
	// UpdatedAt          *time.Time
	Verified *time.Time `json:"_verified"`
}

func init() {
	mogo.ModelRegistry.Register(User{})
}

// Activate service removes one user
func (userservice Userservice) Update(user *entity.User, data map[string]interface{}) (*entity.User, error) {
	conn := db.GetConnection()
	defer conn.Session.Close()

	doc := mogo.NewDoc(user).(*(entity.User))
	for k, v := range data {
		fmt.Printf("%s is also %s", k, v)
		// (doc)[k] = v
	}
	
	/*
		the way mogo updates is
		doc.Username = x
		doc.Email = Y
		
		but i want to be able to pass in an interface with key and value, so

		doc.key = value
	*/

	err := mogo.Save(doc)
	if vErr, ok := err.(*mogo.ValidationError); ok {
		return nil, vErr
	}
	err = mogo.Save(doc)
	return doc, nil
}

It's actually possible that mogo's Update function also allows you to pass in a map[string]interface, but I can't tell from the docs.

yeah the docs is horrible. i was actually thinking of creating my own wrapper around it.
but abeg, i don tire