diff --git a/backend/main.py b/backend/main.py
index 988d31b..706a763 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1,7 +1,7 @@
 import asyncio
 import inspect
 import traceback
-from datetime import datetime, timedelta
+from datetime import datetime
 from pathlib import Path
 from typing import List
 from uuid import uuid4
diff --git a/frontend/lib/backend.py b/frontend/lib/backend.py
index 8df7e5d..2e4b063 100644
--- a/frontend/lib/backend.py
+++ b/frontend/lib/backend.py
@@ -1,5 +1,6 @@
 import streamlit as st
 
+
 def query(verb: str, url: str, **kwargs):
     session = st.session_state.get("session")
     response = getattr(session, verb)(url, **kwargs)
@@ -8,5 +9,5 @@ def query(verb: str, url: str, **kwargs):
         st.session_state["session"] = None
         st.session_state["email"] = None
         st.rerun()
-    
-    return response
\ No newline at end of file
+
+    return response
diff --git a/frontend/lib/chat.py b/frontend/lib/chat.py
index c9b2fe3..cba9621 100644
--- a/frontend/lib/chat.py
+++ b/frontend/lib/chat.py
@@ -5,7 +5,6 @@
 import streamlit as st
 from streamlit_feedback import streamlit_feedback
 
-from frontend.lib.auth import auth
 from frontend.lib.backend import query
 
 
diff --git a/frontend/lib/sidebar.py b/frontend/lib/sidebar.py
index 354d6c6..f5a1961 100644
--- a/frontend/lib/sidebar.py
+++ b/frontend/lib/sidebar.py
@@ -2,8 +2,8 @@
 
 import humanize
 import streamlit as st
-from frontend.lib.backend import query
 
+from frontend.lib.backend import query
 from frontend.lib.chat import Message
 
 
@@ -40,4 +40,3 @@ def list_chats():
 
 def get_chat(chat_id: str):
     return query("get", f"/chat/{chat_id}").json()
-