How to hide/exclude certain fields of foreign key in graphene_django wrt the requested entity?

I have read about how to exclude (hide) certain fields in django and graphene_django in these Links:

• graphql-python repository
• Why does my excluded field still appear in this Django form?
• etc.

Imagine that we have the following Post model which has foreign key to the User model.

apps/posts/models.py

from django.db import models
from apps.users.models import User

class Post(models.Model):
    author = models.ForeignKey(
        User,
        on_delete=models.CASCADE,
        null=False
    )

    created_at = models.DateTimeField(
        auto_now_add=True,
    )

    title = models.TextField(
        null=False,
        max_length=100,
    )

    content = models.TextField(
        null=False,
    )

    def __str__(self):
        return self.title

apps/users/models.py

from django.db import models
from django.contrib.auth.models import AbstractUser

class User(AbstractUser, models.Model):
    phone_no = models.CharField(
        blank=True,
        null=True,
        default="",
        max_length=10,
        verbose_name="Phone Number",
    )

    avatar = models.ImageField(
        null=True,
        upload_to='static',
    )

    USERNAME_FIELD = "username"
    EMAIL_FIELD = "email"

    def __str__(self):
        return self.username

I tried the following but it doesn't work as expected:

apps/posts/schema.py

import graphene
from graphene import Mutation, InputObjectType, ObjectType
from graphene_django.types import DjangoObjectType

from .models import Post


class PostType(DjangoObjectType):
    class Meta:
        model = Post
        exclude_fields = [
            'created_at', #it worked
            'author.password', #the way I tried to hide the foreign key field
            
        ]

class Query(ObjectType):
    posts = graphene.List(
        PostType
    )

    def resolve_posts(self, info):
        #TODO: pagination
        return Post.objects.all()

Screenshot:

How can I hide certain fields of it (like author's password in the above example) in graphql model Types?

from How to hide/exclude certain fields of foreign key in graphene_django wrt the requested entity?