code: func (service *IYOPhonenumberValidationService) ExpireValidation(request *http.Request, key string) (err error) {
  	if key == "" {
  		return
  	}
  	valMngr := validation.NewManager(request)
  	err = valMngr.RemovePhonenumberValidationInformation(key)
  	return
  }
docs: //ExpireValidation removes a pending validation