Store responsible for storing the user.

store.go

// Store responsible for storing the user.
func (s *StoreService) Store(user *User) error {
	userResourceV2 := fmt.Sprintf("%s/%s/%s", usersAPIV2, user.Email, user.Country)
	res, err := s.client.Get(userResourceV2)
	if err != nil {
		if err == srv.ErrCircuitBreakerOpen {
			// fallback to apiv1
			userResourceV1 := fmt.Sprintf("%s?%s&%s", usersAPIV1, user.Email, user.Country)
			res, err = s.client.Get(userResourceV1)
			if err != nil {
				return fmt.Errorf("failed to fetch user: user service is unavailable: %v", err)
			}
		} else {
			return fmt.Errorf("failed to fetch user: %v", err)
		}
	}

        // code omitted 
}