public void AddComment(CommentDTO commentDTO, string userId, string postId)
        {
            _graphDB.AddComment(commentDTO.Comment);
            _graphDB.CreateRelationship(userId, commentDTO.Comment.CommentID, "UserComment");  ///for connect post and comment
            _graphDB.CreateRelationship(postId, commentDTO.Comment.CommentID, "PostComment");  ///for connect user to comment that he wrote

            foreach (var item in commentDTO.Tags)
            {
                _graphDB.CreateRelationship(commentDTO.Comment.CommentID, item, "TagComment");
            }
        }