⚡ Live Sandbox: AI Dev Tool: AGENTSmd AINative SaaS (vbfr)

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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# ================================================
# A production-ready starter boilerplate for building micro-SaaS applications
# using FastAPI, Pydantic v2, and PostgreSQL Vector Search Extension.

from fastapi import FastAPI, HTTPException
from fastapi.responses import JSONResponse
from pydantic import BaseModel, Field
from typing import Optional
import psycopg2
import psycopg2.extras
from psycopg2 import Error

# Initialize the FastAPI application
app = FastAPI()

# Define the PostgreSQL connection settings
POSTGRES_HOST = "localhost"
POSTGRES_DB = "mydatabase"
POSTGRES_USER = "myuser"
POSTGRES_PASSWORD = "mypassword"

# Define the Pydantic model for the user
class User(BaseModel):
    id: int = Field(..., description="The user's ID")
    name: str = Field(..., description="The user's name")
    email: str = Field(..., description="The user's email")

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

Args:
    - user (User): The user

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