Documentation required for distinct error responses, using shared status codes for function join

[yoloroy]

• Service_Gateway_Py/main.py

  Line 327 in 0c61244

  return Response(status_code=404, content='no session')

• Service_Gateway_Py/main.py

  Line 332 in 0c61244

  return Response(status_code=404, content='not welcome')

• Service_Gateway_Py/main.py

  Line 362 in 0c61244

  async def check_access(host: str, authorization: HTTPAuthorizationCredentials) -> Response | None: