public async Task <IActionResult> DeleteSemester(string ritmLogin, int semesterNumber)
        {
            try
            {
                await _studentsRepository.DeleteSemester(ritmLogin, semesterNumber);

                return(OkJson <object>());
            }
            catch (Exception e)
            {
                throw new Exception($"Couldn't delete student {ritmLogin}", e);
            }
        }