refactor: Update handling of query parameters in app.py

app.py

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