BDD project for IUST advanced software engineering course
http://127.0.0.1:8000/signup/ --> POST request to signup.
http://127.0.0.1:8000/login/ --> POST request to login.
http://127.0.0.1:8000/logout/ --> GET request to log out. add Authentication token to the request header.
http://127.0.0.1:8000/customer-info/ --> GET request to display account's info. add Authentication token to the request header.
http://127.0.0.1:8000/customer-update/ --> PATCH request to update account's info. add Authentication token to the request header.