如何在Django Rest框架中自动将登录用户分配到帖子？

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

class Post(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    title = models.CharField(max_length=100)
    content = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)

from rest_framework.decorators import api_view, permission_classes
from rest_framework.permissions import IsAuthenticated
from rest_framework.response import Response

@api_view(['POST'])
@permission_classes([IsAuthenticated])
def create_post(request):
    title = request.data.get('title')
    content = request.data.get('content')
    
    post = Post.objects.create(user=request.user, title=title, content=content)
    
    return Response({'message': 'Post created successfully'})