public async Task <IActionResult> JoinGame([Required] int id)
{
var userId = long.Parse(_httpContextAccessor.HttpContext.User.FindFirst(ClaimTypes.NameIdentifier).Value);
var joinedUser = await _matchmakingService.JoinRaffle(id);
await _hubContext.Clients.Groups(id.ToString()).SendAsync("userJoined", JsonConvert.SerializeObject(joinedUser));
await _hubContext.Groups.AddToGroupAsync(
(await _connectionMapping.GetConnectionIdByUserid(userId)).ConnectionId,
id.ToString());
return(Ok(joinedUser));
}