生成的密碼哈希:
Email: admin@example.com
Password: admin123
Hash: $2y$10$adC.O9uGFQHMSlvnm7ejEutAC9uhMPOPrPpIxHl1LH4nwenw0GNh.

Email: teacher@example.com
Password: teacher123
Hash: $2y$10$BNp1E4hi2qHc/ZlvDXwgwOEayiuvS.jusxerAfwYgZPVXVJtyZWpG

Email: student@example.com
Password: student123
Hash: $2y$10$/aMbH2.PR.3O9nTfHH8X5u/amlxYeWkl7PIauSHx2Hm2Mk1SzYnci