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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# Description: A production-ready, type-safe boilerplate for building micro-SaaS applications using FastAPI and Pydantic v2.

from fastapi import FastAPI, Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from pydantic import BaseModel, validator
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 sqlalchemy.exc import IntegrityError
from cloudflare import CloudflareAPI
from hono import HonoAPI

# Initialize FastAPI app
app = FastAPI()

# Initialize Cloudflare API
cf_api = CloudflareAPI()

# Initialize Hono API
hono_api = HonoAPI()

# Define database connection
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 OAuth2 scheme
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token

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