⚡ Live Sandbox: AI Dev Tool: FastAPI Pydantic v2 (av86)

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```python
# AI Dev Tool: Hono Cloudflare Workers D1 Starter with FastAPI Pydantic v2 Micro-SaaS
# Description: A production-ready starter boilerplate for building micro-SaaS applications
#              using Hono Cloudflare Workers, D1 database, FastAPI, and Pydantic v2.

import os
import json
from fastapi import FastAPI, Depends, HTTPException
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from pydantic import BaseModel
from hono import Hono
from cloudflare import WorkersKV

# Initialize the FastAPI application
app = FastAPI()

# Initialize the Hono Cloudflare Workers client
hono = Hono()

# Initialize the Cloudflare Workers KV storage
kv = WorkersKV()

# Define the Pydantic model for the user data
class UserData(BaseModel):
    id: str
    name: str
    email: str

# Define the authentication scheme using HTTP Bearer tokens
security = HTTPBearer()

# Define the dependency function to get the authenticated user
async def get_user(credentials: HTTPAuthorizationCredentials = Depends(security)):
    token = credentials.credentials
    user_data = await kv.get(token)
    if not user_data:
        raise

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