cus_os: inplement of cus_func. cus_func: customer use this function to make an order, change an order , cancel an order, check an order and search flight information. cus_login: customer enter id and password and they can log in cus_signup: customer enter password, email and they can sign up, one email cannot be use twice
administer_os:inplement of administer_func administer_func: administer use this function to add flight information and change flight information. administer_login: administer enter id and password and they can log in
#########update 12.3 2:00am########: complete administor_login complete customer_login test_admin.py is an example for using administor_login test_cus.py is an example for using customer_login