public virtual void DeletePerson(string personGroupId, Guid personId)
 {
     PolicyService.ExecuteRetryAndCapture400Errors(
         "FaceService.DeletePerson",
         ApiKeys.FaceRetryInSeconds,
         () =>
     {
         FaceRepository.DeletePerson(personGroupId, personId);
         return(true);
     },
         false);
 }