router parameter in Application constructor

[netwang]

Application(
services=services,
show_error_details=configuration.show_error_details,
router=RouterWithPrefix(f'/{configuration.App_Name}/') if configuration.production else None,
)

class RouterWithPrefix(Router):
"""Router With Prefix."""

def __init__(self, prefix: str) -> None:
    super().__init__()

    self.__prefix = prefix

def add(self, method: str, pattern: AnyStr, handler: Any) -> None:
    """Add."""
    if isinstance(pattern, str):
        pattern = (self.__prefix + pattern).replace('//', '/')
    else:
        pattern = (self.__prefix.encode() + pattern).replace(b'//', b'/')

    super().add(method, pattern, handler)

Above code is for BlackSheep V1.2.18 to add prefix to all routes,. It changes
http://localhost:1400/login
to
http://localhost:1400/QMOSDS/login

I updated to BlackSheep 2.0.4. Above cold will not work when configuration.production is True.

Above cold will work when configuration.production is False. Use default_router

    if router is None:
        router = default_router if env_settings.use_default_router else Router()

How to add prefix to all routes in BlackSheep 2.0.4?? Thanks!