public async Task <User> Register(User user, string password)
        {
            byte[] passwordHash, passwordSalt;
            Utilites.CreatePasswordHash(password, out passwordHash, out passwordSalt);
            user.PasswordHash = passwordHash;
            user.PasswordSalt = passwordSalt;

            await _db.UserRepository.InsertAsync(user);

            await _db.SaveAsync();

            return(user);
        }