⚡ Live Sandbox: AI Dev Tool: Rust WebAssembly Edge (wd1i)

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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# Description: Production-ready FastAPI boilerplate with Pydantic v2, PostgreSQL, and Hono Cloudflare Workers D1 integration

from fastapi import FastAPI, Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from pydantic import BaseModel, EmailStr
from typing import Optional
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from hono import Hono
from cloudflare import Cloudflare

# Initialize FastAPI app
app = FastAPI()

# Initialize Hono Cloudflare Workers D1
hono = Hono(api_key="YOUR_HONO_API_KEY")

# Initialize Cloudflare
cloudflare = Cloudflare(api_key="YOUR_CLOUDFLARE_API_KEY")

# Initialize PostgreSQL database
SQLALCHEMY_DATABASE_URL = "postgresql://user:password@host:port/dbname"
engine = create_engine(SQLALCHEMY_DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

# Define user model
class User

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