code: def run(self):
      from dvc_studio_client.auth import (
          StudioAuthError,
          get_access_token,
      )
  
      from dvc.env import DVC_STUDIO_URL
      from dvc.ui import ui
      from dvc.utils.studio import STUDIO_URL
  
      name = self.args.name
      hostname = (
          self.args.hostname
          or os.environ.get(DVC_STUDIO_URL)
          or STUDIO_URL
      )
      scopes = self.args.scopes
  
      try:
          token_name, access_token = get_access_token(
              token_name=name,
              hostname=hostname,
              scopes=scopes,
              use_device_code=self.args.no_open,
              client_name="DVC",
          )
      except StudioAuthError as e:
          ui.error_write(str(e))
          return 1
  
      self.save_config(hostname, access_token)
      ui.write(
          "Authentication has been successfully completed."
          "The generated token will now be accessible as"
          f" {token_name} in the user's Studio profile."
      )
      return 0
  
file_path: dvc/dvc/commands/studio.py
imports: import os
  from funcy import get_in
  from dvc.cli import formatter
  from dvc.cli.utils import append_doc_link
  from dvc.commands.config import CmdConfig
  from dvc.log import logger
label_desc: Use image node_id 1 for calling the CmdStudioLogin obj's underlying member method code with example usage: obj.run() and returns: int, int