public IActionResult Resize([FromForm] PositionDto maxPosition)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest());
            }

            if (!_isAdmin)
            {
                return(Unauthorized());
            }

            _leaderboard.Resize(maxPosition.Position);
            _hubContext.Clients.All.SendAsync("Update");
            return(Redirect(Request.Headers["Referer"]));
        }