code: def verify_password(
      username: str, password: str
  ) -> t.Union[str, None]:
      if username in users and check_password_hash(
          users[username], password
      ):
          return username
      return None
  
imports: import typing
  from apiflask import APIFlask, HTTPBasicAuth
  from werkzeug.security import generate_password_hash, check_password_hash
label_desc: Use image node_id 1 for calling a global function with example usage: verify_password(username, password) and returns: None, username