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from fastapi import FastAPI
from fastapi.responses import JSONResponse
from fastapi.requests import Request
from fastapi.security.utils import get_authorization_scheme
from sqlalchemy.ext.asyncio import create_async_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

app = FastAPI()

engine = create_async_engine("sqlite:///database.db")
Base = declarative_base()

async def get_db():
    async with sessionmaker(engine, class_=AsyncSession)() as db:
        yield db

@app.on_event("startup")
async def startup():
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)

@app.on_event("shutdown")
async def shutdown():
    await engine.dispose()