Changes made as requested

Author: vaibhavatlan

pyatlan/client/credential.py

@@ -37,20 +37,19 @@ def __init__(self, client: ApiCaller):
         self._client = client
 
     @validate_arguments
-    def creator(
-        self, credential: Credential, test: Optional[bool] = True
-    ) -> CredentialResponse:
+    def creator(self, credential: Credential, test: bool = True) -> CredentialResponse:
         """
         Create a new credential.
 
         :param credential: provide full details of the credential's to be created.
-        :param test: whether to validate the credentials (True) or skip validation (False) before creation.
+        :param test: whether to validate the credentials (`True`) or skip validation
+        (`False`) before creation, defaults to `True`.
         :returns: A CredentialResponse instance.
         :raises ValidationError: If the provided `credential` is invalid.
         """
         raw_json = self._client._call_api(
             api=CREATE_CREDENTIALS.format_path_with_params(),
-            query_params={"testCredential": f"{test}"},
+            query_params={"testCredential": test},
             request_obj=credential,
         )
         return CredentialResponse(**raw_json)