adding pkce log

Author: sfc-gh-mkeller

src/snowflake/connector/auth/oauth_code.py

@@ -79,6 +79,8 @@ def __init__(
         self._oauth_token = None
         self._protocol = "http"
         self.pkce = pkce
+        if pkce:
+            logger.debug("oauth pkce is going to be used")
         self._verifier: str | None = None
 
     def reset_secrets(self) -> None: