public void TestChangePassword()
        {
            // var dataPersistence = ApplicationServiceContext.Current.GetService<IDataPersistenceService<SecurityUser>>();
            IIdentityProviderService identityProvider = ApplicationServiceContext.Current.GetService <IIdentityProviderService>();
            //var user = dataPersistence.Query(u => u.UserName == "*****@*****.**", null).First();
            // var existingPassword = user.PasswordHash;

            // Now change the password
            var principal = identityProvider.Authenticate("*****@*****.**", "password");

            identityProvider.ChangePassword("*****@*****.**", "newpassword", principal);
            principal = identityProvider.Authenticate("*****@*****.**", "newpassword");
            identityProvider.ChangePassword("*****@*****.**", "password", principal);
            //user = dataPersistence.Get(user.Id(), principal, false);
            //Assert.AreNotEqual(existingPassword, user.PasswordHash);

            // Change the password back
            //user.PasswordHash = existingPassword;
            //dataPersistence.Update(user, principal, TransactionMode.Commit);
        }