protected function migrateTeacher(Teacher $teacher) {
        $user = User::firstOrNew([
            'email' => $teacher->email,
        ]);
        $user->name = $teacher->name;
        $user->password = bcrypt('secret');
        $user->remember_token = str_random(10);
        $user->save();
        //TODO: migrate teacher codes, create roles and assign to user/teachers
    }