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

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel, validator
from typing import Optional
from supabase import create_client, Client

# Initialize FastAPI app
app = FastAPI()

# Initialize Supabase client
SUPABASE_URL = "https://your-supabase-instance.supabase.co"
SUPABASE_KEY = "your-supabase-key"
supabase: Client = create_client(SUPABASE_URL, SUPABASE_KEY)

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

@validator("email")
    def validate_email(cls, v):
        if "@" not in v:
            raise ValueError("Invalid email address")
        return v

# Define API endpoint for creating new users
@app.post("/users/")
async def create_user(user: User):
    """
    Create a new user.

Args:
    - user (User): User data.

Returns:
    - User: Created user data

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