code: def is_pr_author(gh_username: str, pr_config: PRConfig) -> bool:
      return gh_username == pr_config["author"]
  
imports: import asyncio
  import concurrent.futures
  import json
  import logging
  import os
  import traceback
  from contextlib import AsyncExitStack
  from typing import Any, Callable, Dict, List, NoReturn, Optional, Set, Tuple, TypedDict
  import aiohttp_session
  import kubernetes_asyncio
  import kubernetes_asyncio.client
  import kubernetes_asyncio.config
  import uvloop
  import yaml
  from aiohttp import web
  from gidgethub import aiohttp
  from gidgethub import routing
  from gidgethub import sansio
  from prometheus_async.aio.web import server_stats
  from gear import AuthServiceAuthenticator, Database, UserData, check_csrf_token, json_request, json_response, monitor_endpoints_middleware, setup_aiohttp_session
  from gear.profiling import install_profiler_if_requested
  from hailtop import aiotools, httpx
  from hailtop.auth import hail_credentials
  from hailtop.batch_client.aioclient import Batch, BatchClient
  from hailtop.config import get_deploy_config
  from hailtop.hail_logging import AccessLogger
  from hailtop.tls import internal_server_ssl_context
  from hailtop.utils import collect_aiter, humanize_timedelta_msecs, periodically_call, retry_transient_errors
  from web_common import render_template, set_message, setup_aiohttp_jinja2, setup_common_static_routes
  from .constants import AUTHORIZED_USERS, TEAMS
  from .environment import CLOUD, DEFAULT_NAMESPACE, STORAGE_URI
  from .envoy import create_cds_response, create_rds_response
  from .github import PR, WIP, FQBranch, MergeFailureBatch, Repo, UnwatchedBranch, WatchedBranch, select_random_teammate
  from .utils import gcp_logging_queries
label_desc: Use image node_id 6 for calling a global function with example usage: is_pr_author(gh_username, pr_config) and returns: unknown