public async Task DeleteExamSite(int id)
{
var examSite = await _context.ExamSites.FindAsync(id);
_context.ExamSites.Remove(examSite);
await _context.SaveChangesAsync();
}
public async void SaveNewExamSession(ExamSessionDto examSessionDto)
{
_context.Add(await MapFromDto(examSessionDto));
await _context.SaveChangesAsync();
}