Add function to laravel reset password auth

everybody, I need to save old user password in old_password in users table

So i did

 protected function old_passwords($user, $password)
    {
        $old_password = $user->password;
        $user->old_passwords =$old_password;
        $user->save();
    }

My Route

Route::post('/password/reset/{token}',  'Auth\ResetPasswordController@old_passwords');

but nothing happens any help

via Chebli Mohamed