private bool ApplicationIdIsNullOrValid(string applicationId)
 {
     // Duplicate code in AuthenticateOrchestrator
     if (applicationId == null)
     {
         return(true);
     }
     if (!_applicationService.ApplicationExists(applicationId))
     {
         //_logger.LogError("Invalid application id '{0}'", applicationId);
         return(false);
     }
     return(true);
 }