public async Task <IActionResult> DeleteTerm([FromRoute] int id)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            var term = await _termService.GetTermAsync(id);

            if (term == null)
            {
                return(NotFound());
            }

            await _termService.DeleteTermAsync(term);

            return(Ok(term));
        }