**Describe the bug** <!-- A clear and concise description of what the bug is. --> DeprecationWarning is raised. ``` ================================================================ warnings summary ================================================================= tests/test_authorization_code.py::TestOIDCAuthorizationCodeHSAlgorithm::test_id_token /Users/ac45/src/django-oauth-toolkit/tests/test_authorization_code.py:1870: DeprecationWarning: assert key.key_type == "oct" tests/test_models.py::test_application_key /Users/ac45/src/django-oauth-toolkit/tests/test_models.py:549: DeprecationWarning: assert key.key_type == "RSA" tests/test_models.py::test_application_key /Users/ac45/src/django-oauth-toolkit/tests/test_models.py:560: DeprecationWarning: assert key.key_type == "oct" -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html ``` **To Reproduce** <!-- Steps to reproduce the behavior --> ``` tox -e py38-dj42 ``` **Expected behavior** <!-- A clear and concise description of what you expected to happen. --> Should not have DeprecationWarnings **Version** <!-- Version of django-oauth-toolkit --> <!-- Have you tested with the latest version and/or master branch? --> <!-- Replace '[ ]' with '[x]' to indicate that. --> - [ ] I have tested with the latest published release and it's still a problem. - [x] I have tested with the master branch and it's still a problem. **Additional context** <!-- Add any other context about the problem here. --> Will need to identify the specific Deprecation and refactor as needed.