code: func (s *ServicesService) ApplyService(accountID string, serviceIdentifier string, domainIdentifier string, settings DomainServiceSettings) (*serviceResponse, error) {
  	path := versioned(domainServicesPath(accountID, domainIdentifier, serviceIdentifier))
  	serviceResponse := &serviceResponse{}
  
  	resp, err := s.client.post(path, settings, nil)
  	if err != nil {
  		return nil, err
  	}
  
  	serviceResponse.HttpResponse = resp
  	return serviceResponse, nil
  }
docs: // ApplyService applies a one-click services to a domain.
  //
  // See https://developer.dnsimple.com/v2/services/domains/#apply