code: def might_need_auth(f):
      
      @wraps(f)
      def wrapper(cli_args):
          try:
              return_value = f(cli_args)
          except UnauthorizedException as e:
              config = config_from_env(config_from_file())
              username = _get_username(cli_args, config)
  
              if username is None:
                  sys.exit("Please set a username (run `osf -h` for details).")
              else:
                  sys.exit("You are not authorized to access this project.")
  
          return return_value
  
      return wrapper
docs: Decorate a CLI function that might require authentication.
  
      Catches any UnauthorizedException raised, prints a helpful message and
      then exits.