How to use the uvicorn.Config function in uvicorn

def test_multiprocess_run():
    """
    A basic sanity check.

    Simply run the supervisor against a no-op server, and signal for it to
    quit immediately.
    """
    config = Config(app=None, workers=2)
    supervisor = Multiprocess(config, target=run, sockets=[])
    supervisor.signal_handler(sig=signal.SIGINT, frame=None)
    supervisor.run()

    @app.listener("before_server_stop")
    def do_before_server_stop(*args, **kwargs):
        nonlocal before_server_stop
        before_server_stop = True

    @app.listener("after_server_stop")
    def do_after_server_stop(*args, **kwargs):
        nonlocal after_server_stop
        after_server_stop = True

    class CustomServer(uvicorn.Server):
        def install_signal_handlers(self):
            pass

    config = uvicorn.Config(app=app, loop="asyncio", limit_max_requests=0)
    server = CustomServer(config=config)

    with pytest.warns(UserWarning):
        server.run()

    for task in asyncio.Task.all_tasks():
        task.cancel()

    assert before_server_start
    assert after_server_start
    assert before_server_stop
    assert after_server_stop

    @app.listener("before_server_stop")
    async def do_before_server_stop(*args, **kwargs):
        nonlocal before_server_stop
        before_server_stop = True

    @app.listener("after_server_stop")
    async def do_after_server_stop(*args, **kwargs):
        nonlocal after_server_stop
        after_server_stop = True

    class CustomServer(uvicorn.Server):
        def install_signal_handlers(self):
            pass

    config = uvicorn.Config(app=app, loop="asyncio", limit_max_requests=0)
    server = CustomServer(config=config)

    with pytest.warns(UserWarning):
        server.run()

    for task in asyncio.Task.all_tasks():
        task.cancel()

    assert before_server_start
    assert after_server_start
    assert before_server_stop
    assert after_server_stop

if self.should_bcast_check():
            bcast_up = await is_broadcast_up()
            if not bcast_up:
                logger.critical(
                    "run@api_server.py - Broadcast (queue) not up error. please check logs"
                )
                return self.exit(1)

        if self.option("db_seed_env", False):
            self.seed_from_env()

        # taken from uvicorn/main.py:run

        logger.debug("run@api_server.py - Building Uvicorn Config and Server")
        config = UvicornConfig(app, log_config=self.get_uvicorn_logging(), **kwargs)
        server = UvicornServer(config=config)
        if self.option("force_exit"):
            server.force_exit = True

        if isinstance(app, str) and (config.debug or config.reload):
            logger.warning(f"run@api_server.py - Running boucanpy api in dev mode...")
            sock = config.bind_socket()
            supervisor = StatReload(config)
            return supervisor.run(server.run, sockets=[sock])
        elif config.workers > 1:
            sock = config.bind_socket()
            supervisor = Multiprocess(config)
            logger.warning(
                f"run@api_server.py - Running boucanpy api in worker mode..."
            )
            return supervisor.run(server.run, sockets=[sock])

def serve_uvicorn(self, host, port, **kwargs):
        util.ensure_pip("uvicorn")
        import uvicorn
        self.server_version = uvicorn.__version__
        reload = kwargs.get("reload", False)
        app_asgi = build_asgi_i(self)
        config = uvicorn.Config(
            app_asgi,
            host = host,
            port = port,
            reload = reload
        )
        self._server = uvicorn.Server(config = config)
        self._server.run()

def __init__(self, app, **kwargs):
        self.event = threading.Event()
        self.config = uvicorn.Config(app, **kwargs)
        self.server = uvicorn.Server(config=self.config)
        self.config.load()

        super().__init__(coroutine=self.run(), name="Webserver thread")