code: def user_validation():
      user_token = os.environ.get("HF_TOKEN", None)
  
      if user_token is None:
          raise ValueError("Please login with a write token.")
  
      user_token, valid_can_pay, who_is_training = _login_user(
          user_token
      )
  
      if user_token is None or len(user_token) == 0:
          raise ValueError("Please login with a write token.")
  
      return user_token, valid_can_pay, who_is_training
  
imports: import json
  import os
  import signal
  import socket
  import subprocess
  import psutil
  import requests
  from autotrain import config, logger
  from autotrain.commands import launch_command
  from autotrain.trainers.clm.params import LLMTrainingParams
  from autotrain.trainers.dreambooth.params import DreamBoothTrainingParams
  from autotrain.trainers.generic.params import GenericParams
  from autotrain.trainers.image_classification.params import ImageClassificationParams
  from autotrain.trainers.seq2seq.params import Seq2SeqParams
  from autotrain.trainers.tabular.params import TabularParams
  from autotrain.trainers.text_classification.params import TextClassificationParams
label_desc: Use image node_id 8 for calling a global function with example usage: user_validation() and returns: user_token,  valid_can_pay,  who_is_training