如何使用flask和MongoDB将用户帖子与其会话链接起来？

from flask import Flask, request
from pymongo import MongoClient

app = Flask(__name__)
client = MongoClient('mongodb://localhost:27017/')
db = client['your_database_name']

posts = db['posts']

@app.route('/post', methods=['POST'])
def create_post():
    data = request.get_json()
    post = {
        'user_id': data['user_id'],
        'content': data['content']
    }
    post_id = posts.insert_one(post).inserted_id
    return str(post_id)

@app.route('/posts/<user_id>', methods=['GET'])
def get_user_posts(user_id):
    user_posts = posts.find({'user_id': user_id})
    result = []
    for post in user_posts:
        result.append(post)
    return str(result)

if __name__ == '__main__':
    app.run()