生成的密碼哈希:
Email: admin@example.com
Password: admin123
Hash: $2y$10$pSrkj.KLpEwPw7BpJZkycu2UOJ8e/S3QUU9QvGSWNYvqJo88wd2iq

Email: teacher@example.com
Password: teacher123
Hash: $2y$10$.zQihc7dX4KEB1YRwLwNWu9H8phJcAi0x17sA8Y3nWcyA9ajgOluW

Email: student@example.com
Password: student123
Hash: $2y$10$ffC0mLIBWVuFq3M1YkisPuW8kxhp8tRiL0Ochot9fnvWV4xHvah62