public async Task <User> RegisterUserAsync(User user, string password)
{
if (string.IsNullOrWhiteSpace(password))
{
throw new AppException("Password is required");
}
var existingUser = await _userRepository.FindUser(user.Email);
if (existingUser != null)
{
throw new AppException("User already exists!");
}
byte[] passwordHash, passwordSalt;
_securityService.CreatePasswordHash(password, out passwordHash, out passwordSalt);
user.PasswordHash = passwordHash;
user.PasswordSalt = passwordSalt;
await _userRepository.CreateUser(user);
return(user);
}