public async Task <IActionResult> OnGet(Guid?verificationIdentifier)
        {
            if (verificationIdentifier == null)
            {
                return(RedirectToPage("../Security/TokenError"));
            }
            VerificationToken verificationToken = await _unitOfWork.VerificationTokens.GetTokenByIdentifierAsync(verificationIdentifier.Value);

            Participant  = new ParticipantDto2(verificationToken.Participant); //id null?
            Examinations = await _unitOfWork.ExaminationRepository.GetExaminationByParticipant(Participant.Id);

            return(Page());
        }
 public void OnGet()
 {
     Participant = new ParticipantDto2();
 }