    def test_webhook_authorization(self):
        errors = check_deprecated_settings(None)
        self.assertEqual(errors, [checks.Warning(
            "The ANYMAIL setting 'WEBHOOK_AUTHORIZATION' has been renamed 'WEBHOOK_SECRET' to improve security.",
            hint="You must update your settings.py. The old name will stop working in a near-future release.",
            id="anymail.W001",
        )])
Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.