code: def __init__(
      self,
      gh_username: str,
      hail_username: Optional[str] = None,
      teams: Optional[List[str]] = None,
  ):
      self.gh_username = gh_username
      self.hail_username = hail_username
      self.teams = teams if teams is not None else []
  
label_desc: Use image node_id 1 to create a new User object  with example: obj = User(gh_username, hail_username, teams)