⚡ Live Sandbox: AI Dev Tool: Bun Hono TypeSafe (0eoa)

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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# ======================================================

# Import required libraries
from fastapi import FastAPI, Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from pydantic import BaseModel, Field
from pydantic.errors import ListError
from typing import List, Optional
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker, Session
from sqlalchemy.exc import SQLAlchemyError
from cloudflare import CloudflareAPI
from hono import HonoAPI

# Initialize FastAPI application
app = FastAPI(
    title="FastAPI Pydantic v2 Micro-SaaS Boilerplate",
    description="A production-ready boilerplate for building micro-SaaS applications",
    version="1.0.0",
)

# Define OAuth2 scheme
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

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

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