⚡ Live Sandbox: AI Dev Tool: FastAPI Pydantic v2 (elf5)

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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# Description: A production-ready FastAPI boilerplate with Pydantic v2 for building micro-SaaS applications
# Author: [Your Name]

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel, Field
from typing import Optional
import uvicorn
import logging

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

# Define a Pydantic model for user data
class User(BaseModel):
    id: int = Field(..., description="Unique user ID")
    name: str = Field(..., description="User name")
    email: str = Field(..., description="User email")

# Define a Pydantic model for error responses
class ErrorResponse(BaseModel):
    error: str = Field(..., description="Error message")
    status_code: int = Field(..., description="HTTP status code")

# Define a route for creating a new user
@app.post("/users/", response_model=User)
async def create_user(user: User):
    """
    Create a new user

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