document client secret empty

Author: aldogonzalez8

airbyte_cdk/sources/declarative/auth/oauth.py

@@ -33,7 +33,7 @@ class DeclarativeOauth2Authenticator(AbstractOauth2Authenticator, DeclarativeAut
     Attributes:
         token_refresh_endpoint (Union[InterpolatedString, str]): The endpoint to refresh the access token
         client_id (Union[InterpolatedString, str]): The client id
-        client_secret (Union[InterpolatedString, str]): Client secret
+        client_secret (Union[InterpolatedString, str]): Client secret (can be empty for APIs that support this)
         refresh_token (Union[InterpolatedString, str]): The token used to refresh the access token
         access_token_name (Union[InterpolatedString, str]): THe field to extract access token from in the response
         expires_in_name (Union[InterpolatedString, str]): The field to extract expires_in from in the response
@@ -208,7 +208,7 @@ def get_client_secret(self) -> str:
             logger.warning(
                 "OAuthAuthenticator was unable to evaluate client_secret parameter hence it'll be empty"
             )
-        return client_secret  # type: ignore # value will be returned as a string, or an error will be raised
+        return client_secret  # type: ignore # value will be returned as a string, which might be empty
 
     def get_refresh_token_name(self) -> str:
         return self._refresh_token_name.eval(self.config)  # type: ignore # eval returns a string in this context