public async Task <IActionResult> GetAsync([FromQuery] string search = null)
        {
            List <Transfer_Specialty> SpecialtyAll;

            if (search == null)
            {
                _logger.LogInformation($"Retrieving all specialties");
                SpecialtyAll = (await _specialtyRepository.GetSpecialtyAsync()).Select(Mapper.MapSpecialty).ToList();
            }
            else
            {
                _logger.LogInformation($"Retrieving specialties with parameters {search}.");
                SpecialtyAll = (await _specialtyRepository.GetSpecialtyAsync(search)).Select(Mapper.MapSpecialty).ToList();
            }
            try
            {
                _logger.LogInformation($"Sending {SpecialtyAll.Count} Specialties.");
                return(Ok(SpecialtyAll));
            }
            catch (Exception e)
            {
                _logger.LogWarning($"Error! {e.Message}.");
                return(StatusCode(500));
            }
        }