retrieve api keys correctly from secret

app.py

@@ -195,13 +195,13 @@ if prompt := st.chat_input("Type here"):
     options["temperature"] = 0.0
 
     if selected_reasoner == "Claude Sonnet":
-        api_key = os.getenv(st.session_state["claude_key"])
+        api_key = os.getenv("claude_key")
         options["API_KEY"] = api_key
         options["model_family"] = "Anthropic"
         options["model_name"] = "claude-3-5-sonnet-20240620"
 
     elif selected_reasoner == "GPT-4o":
-        api_key = os.getenv(st.session_state["openai_key"])
+        api_key = os.getenv("openai_key")
         options["API_KEY"] = api_key
         options["model_family"] = "OpenAI"
         options["model_name"] = "gpt-4o-2024-05-13"