code: func (s *ContactsService) ListContacts(accountID string, options *ListOptions) (*contactsResponse, error) {
  	path := versioned(contactPath(accountID, 0))
  	contactsResponse := &contactsResponse{}
  
  	path, err := addURLQueryOptions(path, options)
  	if err != nil {
  		return nil, err
  	}
  
  	resp, err := s.client.get(path, contactsResponse)
  	if err != nil {
  		return contactsResponse, err
  	}
  
  	contactsResponse.HttpResponse = resp
  	return contactsResponse, nil
  }
docs: // ListContacts list the contacts for an account.
  //
  // See https://developer.dnsimple.com/v2/contacts/#list