sessionauth/login.go
func UpdateUser(s sessions.Session, user User) error {
	s.Set(SessionKey, user.UniqueId())
	return nil
}
func UpdateUser(s sessions.Session, user User) error {
	s.Set(SessionKey, user.UniqueId())
	return nil
}
// UpdateUser updates the User object stored in the session. This is useful incase a change
// is made to the user model that needs to persist across requests.