// create the ROLE_ADMIN role
        $role = new Role();
        $role->setName('ROLE_ADMIN');

        $manager->persist($role);

        // create a user
        $user = new User();
        $user->setFirstName('John');
        $user->setLastName('Doe');
        $user->setEmail('john@example.com');
        $user->setUsername('john.doe');
        $user->setSalt(md5(time()));

        // encode and set the password for the user,
        // these settings match our config
        $encoder = new MessageDigestPasswordEncoder('sha512', true, 10);
        $password = $encoder->encodePassword('admin', $user->getSalt());
        $user->setPassword($password);

        $user->getUserRoles()->add($role);

        $manager->persist($user);