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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# ================================================
# This is a production-ready boilerplate for building micro-SaaS applications
# using FastAPI and Pydantic v2. It includes a basic API structure, authentication,
# and database integration with Supabase.

from fastapi import FastAPI, Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from pydantic import BaseModel, EmailStr
from supabase import create_client, Client
from typing import Optional

# Initialize the FastAPI application
app = FastAPI()

# Initialize the Supabase client
supabase_url: str = "https://your-supabase-url.supabase.co"
supabase_key: str = "your-supabase-key"
supabase: Client = create_client(supabase_url, supabase_key)

# Define the user model
class User(BaseModel):
    """User model"""
    id: int
    email: EmailStr
    password: str

# Define the authentication scheme
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

# Define the authentication endpoint
@app.post("/token")
async def login(form_data: OAuth2PasswordRequestForm

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