refactor: Update handling of query parameters in app.py

app.py

@@ -55,6 +55,5 @@ else:
         login()
 
 # To handle the callback
-query_params = st.query_params()
-if "code" in query_params:
-    st.session_state.auth_code = query_params["code"][0]
+if "code" in st.query_params:
+    st.session_state.auth_code = st.query_params["code"][0]