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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# Description: Production-ready boilerplate for building micro-SaaS applications with FastAPI and Pydantic v2
# Author: Elite Software Architect

from fastapi import FastAPI, Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from pydantic import BaseModel, Field
from typing import Optional
from datetime import datetime, timedelta
import uvicorn
import logging

# Initialize the FastAPI application
app = FastAPI()

# Define the OAuth2 scheme
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

# Define the user model
class User(BaseModel):
    """User model"""
    id: int = Field(..., description="User ID")
    username: str = Field(..., description="Username")
    email: str = Field(..., description="Email")
    full_name: Optional[str] = Field(None, description="Full name")
    disabled: Optional[bool] = Field(False, description="Disabled")

# Define the token model
class Token(BaseModel):
    """Token model"""
    access_token: str = Field(..., description="Access token")
    token_type

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