code: def add_user(filepath, username, password):
      filepath = get_hub_filepath(filepath)
      if filepath is None:
          return
      ExplainerHub._validate_users_file(filepath)
      ExplainerHub._add_user_to_file(
          filepath, username=username, password=password
      )
      click.echo(f"explainerhub ===> user added to {filepath}!")
  
imports: import os
  import webbrowser
  from pathlib import Path
  from importlib import import_module
  from copy import deepcopy
  import pickle
  import oyaml
  import pandas
  import joblib
  import click
  import waitress
  from explainerdashboard import *
  from explainerdashboard.explainers import BaseExplainer
  from explainerdashboard.dashboards import ExplainerDashboard
label_desc: Use image node_id 13 for calling a global function with example usage: add_user(filepath, username, password) without return types