public void CreateUser(string username, string password)
{
var users = _preferenceService.GetObjectArray <User>("authorisation.users").ToList();
if (users.Any(u => u.Username.ToLower().Trim() == username.ToLower().Trim()))
{
throw new InvalidOperationException("User already exists");
}
var salt = GenerateSalt();
users.Add(new User(username, HashPassword(password, salt), salt));
_preferenceService.SetObjectArray("authorisation.users", users.ToArray());
}
