code: def logout():
      """Clear the current session, including the stored user id."""
      session.clear()
      return redirect(url_for("index"))
  
file_path: flask/examples/tutorial/flaskr/auth.py
imports: import functools
  from flask import Blueprint
  from flask import flash
  from flask import g
  from flask import redirect
  from flask import render_template
  from flask import request
  from flask import session
  from flask import url_for
  from werkzeug.security import check_password_hash
  from werkzeug.security import generate_password_hash
  from .db import get_db
label_desc: Use image node_id 5 for calling a global function with example usage: logout() and returns: redirect