public async Task <IList <AssignmentResultDto> > GetResultsForUserAsync(int chapterId, int userId, DateTime?dateUtc)
{
var assignmentsWithResults = await _testResultRepository.GetLastTestResultsOfChapterAsync(chapterId, userId, dateUtc);
return(assignmentsWithResults.Select(a => _assignmentWitResultsConverter.ToAssignmentResultDto(a)).ToList());
}