生成的密碼哈希:
Email: admin@example.com
Password: admin123
Hash: $2y$10$Iyzwq9AyDTcLZNxQz6KElu2l3PFfuTRFI/ihJv.FkHePgn9nn.fti

Email: teacher@example.com
Password: teacher123
Hash: $2y$10$A1p4395uhfePXz0bDkIG7emf78gBhafSTfE0XI5Npef2ZfFJ2Krna

Email: student@example.com
Password: student123
Hash: $2y$10$LQyyCo6IshG.b9FlREWKEeByiEpfgdEDzMpxUpiIz1CGOBM6TljjW