public async Task <ApplicationUserOut> Create(ApplicationUserOut user)
        {
            Validate(user);
            user.Id = Guid.NewGuid().ToString();

            return((await repository.Upsert(user.AsDbModel())).AsOutModel());
        }
 public async Task <ApplicationUserOut> Update(ApplicationUserOut user)
 => (await repository.Upsert(user.AsDbModel())).AsOutModel();