SNOW-98873: Make authenticator field case insensitive earlier

Author: sfc-gh-stakeda

connection.py

@@ -747,6 +747,9 @@ def __config(self, **kwargs):
             if u'protocol' not in kwargs:
                 setattr(self, u'_protocol', u'https')
 
+        if self._authenticator:
+            self._authenticator = self._authenticator.upper()
+
         if not self.user and self._authenticator != OAUTH_AUTHENTICATOR:
             # OAuth Authentication does not require a username
             Error.errorhandler_wrapper(
@@ -759,9 +762,6 @@ def __config(self, **kwargs):
         if self._private_key:
             self._authenticator = KEY_PAIR_AUTHENTICATOR
 
-        if self._authenticator:
-            self._authenticator = self._authenticator.upper()
-
         if self._authenticator != EXTERNAL_BROWSER_AUTHENTICATOR and \
                 self._authenticator != OAUTH_AUTHENTICATOR and \
                 self._authenticator != KEY_PAIR_AUTHENTICATOR: