Merge branch 'main' into 'yrq/feature/bill-api'

core/api/bill.py

core/tests.py

core/tests/__init__.py

core/tests/test_auth.py

core/tests/test_bill.py

core/tests/test_coupon.py

core/tests/test_password.py

core/tests/test_profile.py

core/urls.py

docs/requirements.md

ece651_backend/settings.py

requirements.txt