code: def register_subcommand(parser: _SubParsersAction):
      login_parser = parser.add_parser(
          "login",
          help="Log in using a token from huggingface.co/settings/tokens",
      )
      login_parser.add_argument(
          "--token",
          type=str,
          help="Token generated from https://huggingface.co/settings/tokens",
      )
      login_parser.add_argument(
          "--add-to-git-credential",
          action="store_true",
          help="Optional: Save token to git credential helper.",
      )
      login_parser.set_defaults(func=lambda args: LoginCommand(args))
      whoami_parser = parser.add_parser(
          "whoami",
          help="Find out which huggingface.co account you are logged in as.",
      )
      whoami_parser.set_defaults(func=lambda args: WhoamiCommand(args))
      logout_parser = parser.add_parser("logout", help="Log out")
      logout_parser.set_defaults(func=lambda args: LogoutCommand(args))
  
      # new system: git-based repo system
      repo_parser = parser.add_parser(
          "repo",
          help="{create} Commands to interact with your huggingface.co repos.",
      )
      repo_subparsers = repo_parser.add_subparsers(
          help="huggingface.co repos related commands"
      )
      repo_create_parser = repo_subparsers.add_parser(
          "create", help="Create a new repo on huggingface.co"
      )
      repo_create_parser.add_argument(
          "name",
          type=str,
          help="Name for your repo. Will be namespaced under your username to build the repo id.",
      )
      repo_create_parser.add_argument(
          "--type",
          type=str,
          help='Optional: repo_type: set to "dataset" or "space" if creating a dataset or space, default is model.',
      )
      repo_create_parser.add_argument(
          "--organization",
          type=str,
          help="Optional: organization namespace.",
      )
      repo_create_parser.add_argument(
          "--space_sdk",
          type=str,
          help='Optional: Hugging Face Spaces SDK type. Required when --type is set to "space".',
          choices=SPACES_SDK_TYPES,
      )
      repo_create_parser.add_argument(
          "-y",
          "--yes",
          action="store_true",
          help="Optional: answer Yes to the prompt",
      )
      repo_create_parser.set_defaults(
          func=lambda args: RepoCreateCommand(args)
      )
  
imports: import subprocess
  from argparse import _SubParsersAction
  from requests.exceptions import HTTPError
  from huggingface_hub.commands import BaseHuggingfaceCLICommand
  from huggingface_hub.constants import ENDPOINT, REPO_TYPES, REPO_TYPES_URL_PREFIXES, SPACES_SDK_TYPES
  from huggingface_hub.hf_api import HfApi
  from .._login import NOTEBOOK_LOGIN_PASSWORD_HTML, NOTEBOOK_LOGIN_TOKEN_HTML_END, NOTEBOOK_LOGIN_TOKEN_HTML_START, login, logout, notebook_login
  from ..utils import get_token
  from ._cli_utils import ANSI
label_desc: Use image node_id 1 for calling the UserCommands obj's underlying member method code with example usage: obj.register_subcommand(parser) without return types