public async Task EnterLobby([FromBody] string FigherJson)
{
var _userEmail = userEmail().Result;
Fighter newFighter = System.Text.Json.JsonSerializer.Deserialize <Fighter>(FigherJson);
newFighter.ownerEmail = _userEmail;
_arena.AddFighter(newFighter);
await _chatHubContext.Clients.All.SendAsync(Messages.ENTER_LOBBY, _userEmail, JsonSerializer.Serialize(newFighter));
}