detail: "Not Found" when running fastapi with uvicorn - python-multiprocessing

Question

I want to run my FastAPI for multiprocessing but when I try to run using uvicorn with reload and workers but it could not find my login endpoint.
It says "detail": "Not Found" when I hit the endpoint this is my object_counter_api.py
app = FastAPI(
title="Object Counter API",
description="REST API for Object Counter Service.",
version="0.1",
contact={ "name": "my_endpoint",
"url": "https://my_endpoint.com",
"email": "sales#my_endpoint.com"
}
)
# Allow cors error mitigation
origins = ["*"]
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
expose_headers=["*"]
)
class ObjectCounterAPI:
def run_object_counter(self, host, port):
ABLogger.info(self, "running object counter API!")
self.setup()
uvicorn.run("object_counter_api:app", host=self.vehicle_config.host,port=self.vehicle_config.port, reload=True, workers=2)
def setup(self):
#app.post("/vehicle/api/v1/login")
async def login(request: LoginRequest):
ABLogger.info(self, "login credentials check!")
access_token = await self.authenticate_user(request.username, request.password)
response = LoginResponse(access_token=access_token, token_type="bearer")
return response
this is my main.py
if __name__ == "__main__":
#hydra.main(config_path=root / "hydra_config", config_name="debug", version_base=None)
def main(hydra_config: DictConfig):
api = ObjectCounterAPI(hydra_config)
mp.Process(target = api.run_object_counter(host=hydra_config.api.vehicle_counter.host, port=hydra_config.api.vehicle_counter.port)).start()
main()