update app.py

app.py

@@ -52,12 +52,14 @@ def display_chat_history(chain):
 def create_conversational_chain(vector_store):
     load_dotenv()
 
+    replicate_api_token = "r8_AA3K1fhDykqLa5M74E5V0w5ss1z0P9S3foWJl"  # Replace with your actual token
+    os.environ["REPLICATE_API_TOKEN"] = replicate_api_token
+
     llm = Replicate(
         streaming=True,
         model="replicate/llama-2-70b-chat:58d078176e02c219e11eb4da5a02a7830a283b14cf8f94537af893ccff5ee781",
         callbacks=[StreamingStdOutCallbackHandler()],
-        input={"temperature": 0.01, "max_length": 500, "top_p": 1},
-        replicate_api_token=os.environ.get("r8_AA3K1fhDykqLa5M74E5V0w5ss1z0P9S3foWJl")
+        input={"temperature": 0.01, "max_length": 500, "top_p": 1}
     )
     memory = ConversationBufferMemory(memory_key="chat_history", return_messages=True)