[HttpPost]
        public IActionResult PostNote([FromBody] Note note)
        {
            if (!ModelState.IsValid)
            {
                return HttpBadRequest(ModelState);
            }

            string[] separators = { " " };
            List<string> tags = note.TagsAsSingleString.Split(separators, StringSplitOptions.RemoveEmptyEntries).ToList();
            foreach(var t in tags)
            {
                Tag tagInDb = db.Tags.FirstOrDefault(x => x.Name == t);

                if(tagInDb == null)
                {
                    Tag newTag = new Tag { Name = t };
                    db.Tags.Add(newTag);

                }
            }

            db.Notes.Add(note);
            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateException)
            {
                if (NoteExists(note.ID))
                {
                    return new HttpStatusCodeResult(StatusCodes.Status409Conflict);
                }
                else
                {
                    throw;
                }
            }

            return CreatedAtRoute("GetNote", new { id = note.ID }, note);
        }