Merge pull request #18 from ZenGuard-AI/nuradil/fix/gracefull-handle-none-api-key

[feedback] Handle API key being None gracefully

Author: Baur

zenguard/zenguard.py

@@ -58,7 +58,10 @@ def __init__(
         self,
         config: ZenGuardConfig,
     ):
-        self._api_key = config.credentials.api_key
+        api_key = config.credentials.api_key
+        if type(api_key) != str or api_key == '':
+            raise ValueError("The API key must be a string type and not empty.")
+        self._api_key = api_key
         self._backend = "https://api.zenguard.ai/"
 
         self._llm_client = None