How check if user is logged in on server side React, Django, JWT

I have set up authorization using the JWT token. Now I want to give the user access to the protected view, which requires authorization.

class GetUser(APIView):
    authentication_classes = [JWTAuthentication]
    permission_classes = [IsAuthenticated]
    def post(self, request):
        return Response({'username': request.user.username})

How do I check if the user is logged in on the server side? I wrote an asynchronous function that accesses the django rest framework api. But this function always returns a promise no matter what I do.

function saveToken(data) {
  localStorage.setItem('access_token', data.access)
  localStorage.setItem('refresh_token', data.refresh)
  return true
}

async function isLoggedIn() {
  return await axios.post('api/getuser/', {}, {headers: {Authorization: 'Bearer ' + localStorage.getItem('access_token')}})
  .then(async function (response) { return true })
  .catch(async function (error) {
    return await axios.post('api/token/refresh/', {refresh: localStorage.getItem('refresh_token')})
    .then(async function (response) { return saveToken(response.data) })
    .catch(async function (error) { return false })
  })
}

As I understand it, I can't get the value from promise in any way. That's why I decided to write the component this way, but React throws an error.

const ComponentMainArea = () => {
  const location = useLocation()
  const element = useOutlet()

  return isLoggedIn().then((value) => {
    if (!value) { return (<Navigate to="/proxy/8000/login"/>) }
    else {
      return (
        <div className='mainarea'>
          <AnimatePresence mode='wait' initial={true}>
            {element && React.cloneElement(element, { key: location.pathname })}
          </AnimatePresence>
        </div>
      )
    }
  })
}

How do I implement server-side authorization verification?

I also tried to use this asynchronous function in useEffect, but promise does not allow me to work with it normally, or I do not know how to do it