public async Task <IActionResult> AddNewTournament([FromBody] Tournament tournament)
        {
            try
            {
                if (!ModelState.IsValid)
                {
                    return(BadRequest(ModelState));
                }

                await tournamentService.AddNewTournamentAsync(tournament);

                return(CreatedAtAction("GetById", new { id = tournament.TournamentId }, tournament));
            }
            catch (NotFoundInDatabaseException)
            {
                return(NotFound());
            }
            catch (AlreadyInDatabaseException)
            {
                return(Conflict());
            }
            catch (Exception e)
            {
                return(BadRequest(e.Message));
            }
        }