Fix misuse of logging

Author: CarrotManMatt

config.py

@@ -687,7 +687,7 @@ def _setup_env_variables(cls) -> None:
         are only stored after the input values have been validated.
         """
         if cls._is_env_variables_setup:
-            logging.warning("Environment variables have already been set up.")
+            logger.warning("Environment variables have already been set up.")
             return
 
         dotenv.load_dotenv()