update rag example

Signed-off-by: Eric <eric@epsilla.com>

Author: eric-epsilla

examples/hello_epsilla_rag.py

@@ -6,14 +6,22 @@
 # 2. launch a new converstation with epsilla rag
 # 3. send a query and wait the response from epsilla ragg
 
+import os
+
 from pyepsilla import cloud
 
+EPSILLA_PROJECT_ID = os.getenv("EPSILLA_PROJECT_ID", "Your-Project-ID")
+EPSILLA_API_KEY = os.getenv("EPSILLA_API_KEY", "Your-Epsilla-API-Key")
+EPSILLA_RAGAPP_ID = os.getenv("EPSILLA_RAGAPP_ID", "Your-Epsilla-RAGAPP-ID")
+EPSILLA_CONVERSATION_ID = os.getenv("EPSILLA_CONVERSATION_ID", None)
+
+
 # Connect to Epsilla RAG, conversation_id is not a must
 client = cloud.RAG(
-    project_id="**********",
-    api_key="eps_**********",
-    ragapp_id="**********",
-    conversation_id="**********",
+    project_id=EPSILLA_PROJECT_ID,
+    api_key=EPSILLA_API_KEY,
+    ragapp_id=EPSILLA_RAGAPP_ID,
+    conversation_id=EPSILLA_CONVERSATION_ID,
 )
 
 # Start a new conversation with RAG