public async Task <IEnumerable <OrganizatorSelect> > GetOrganizatorSelectsAsync(int userId)
        {
            var organizators = await _organizatorRepository.GetOrganizatorsByAdministratorId(userId);

            var list = new HashSet <OrganizatorSelect>();

            if (!(organizators is null))
            {
                foreach (var o in organizators)
                {
                    list.Add(new OrganizatorSelect {
                        Id = o.OrganizatorId, Name = o.Name
                    });
                }
            }

            return(list);
        }