diff --git a/app/chat.py b/app/chat.py
index f2afbeb..20c3844 100644
--- a/app/chat.py
+++ b/app/chat.py
@@ -313,7 +313,8 @@ def chat_page():
                     key="b_tool_files",
                     format_func=lambda x: x["file_name"],
                 )
-                st.text_input("Tool Name", "get_relevant_documents", key="b_tool_name")
+                st.text_input(
+                    "Tool Name", "get_relevant_documents", key="b_tool_name")
                 st.text_input(
                     "Tool Description",
                     "Searches among user's private files and returns related documents",
@@ -359,14 +360,16 @@ def chat_page():
                 )
                 st.markdown("### Uploaded Files")
                 st.dataframe(
-                    st.session_state.private_kb.list_files(st.session_state.user_name),
+                    st.session_state.private_kb.list_files(
+                        st.session_state.user_name),
                     use_container_width=True,
                 )
                 col_1, col_2 = st.columns(2)
                 with col_1:
                     st.button("Add Files", on_click=add_file)
                 with col_2:
-                    st.button("Clear Files and All Tools", on_click=clear_files)
+                    st.button("Clear Files and All Tools",
+                              on_click=clear_files)
 
         st.button("Clear Chat History", on_click=clear_history)
         st.button("Logout", on_click=back_to_main)
diff --git a/app/login.py b/app/login.py
index 937e8a8..a406f58 100644
--- a/app/login.py
+++ b/app/login.py
@@ -1,5 +1,3 @@
-import json
-import time
 import pandas as pd
 from os import environ
 import streamlit as st
@@ -8,14 +6,18 @@
 AUTH0_CLIENT_ID = st.secrets['AUTH0_CLIENT_ID']
 AUTH0_DOMAIN = st.secrets['AUTH0_DOMAIN']
 
+
 def login():
     if "user_name" in st.session_state or ("jump_query_ask" in st.session_state and st.session_state.jump_query_ask):
         return True
-    st.subheader("🤗 Welcom to [MyScale](https://myscale.com)'s [ChatData](https://github.com/myscale/ChatData)! 🤗 ")
+    st.subheader(
+        "🤗 Welcom to [MyScale](https://myscale.com)'s [ChatData](https://github.com/myscale/ChatData)! 🤗 ")
     st.write("You can now chat with ArXiv and Wikipedia! 🌟\n")
     st.write("Built purely with streamlit 👑 , LangChain 🦜🔗 and love ❤️ for AI!")
-    st.write("Follow us on [Twitter](https://x.com/myscaledb) and [Discord](https://discord.gg/D2qpkqc4Jq)!")
-    st.write("For more details, please refer to [our repository on GitHub](https://github.com/myscale/ChatData)!")
+    st.write(
+        "Follow us on [Twitter](https://x.com/myscaledb) and [Discord](https://discord.gg/D2qpkqc4Jq)!")
+    st.write(
+        "For more details, please refer to [our repository on GitHub](https://github.com/myscale/ChatData)!")
     st.divider()
     col1, col2 = st.columns(2, gap='large')
     with col1.container():
@@ -33,7 +35,7 @@ def login():
     st.write("- [Privacy Policy](https://myscale.com/privacy/)\n"
              "- [Terms of Sevice](https://myscale.com/terms/)")
     if st.session_state.auth0 is not None:
-        st.session_state.user_info = dict(st.session_state.auth0) 
+        st.session_state.user_info = dict(st.session_state.auth0)
         if 'email' in st.session_state.user_info:
             email = st.session_state.user_info["email"]
         else:
@@ -44,6 +46,7 @@ def login():
     if st.session_state.jump_query_ask:
         st.experimental_rerun()
 
+
 def back_to_main():
     if "user_info" in st.session_state:
         del st.session_state.user_info