Update app.py

app.py

@@ -87,7 +87,8 @@ def architecture_with_chroma(data):
     query = data_dict.get('query')
     if query is None or query == "":
         return "please enter a query to process"
-
+    if(not os.path.exists(id)):
+        return "sorry ,there is no directory for this client"
     collection = chroma_client.get_or_create_collection(name=id)
     results = collection.query(
         query_texts=[query],