code: def router():
      query_params = st.experimental_get_query_params()
      page_param = query_params.get("page", None)
      if (
          query_params.get("token", None) is not None
          and query_params.get("user_id", None) is not None
          and page_param is not None
      ):
          # render user page
          user_page(
              page_param=page_param[0],
              user_id=query_params.get("user_id")[0],
              token=query_params.get("token")[0],
          )
      elif page_param is not None:
          auth_page(page_param=page_param[0])
      else:
          st.write("Please setup proxy")
  
file_path: litellm/ui/pages/user.py
imports: import streamlit
  from dotenv import load_dotenv
  import requests, base64, binascii
  import os
label_desc: Use image node_id 5 for calling a global function with example usage: router() without return types