SQLAlchemy 2.0 async — setup cơ bản thế nào?

from sqlalchemy.ext.asyncio import (
    create_async_engine, AsyncSession, async_sessionmaker
)
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column

engine = create_async_engine(
    "postgresql+asyncpg://user:pass@localhost/db",
    pool_size=10, max_overflow=20,
)
AsyncSessionLocal = async_sessionmaker(engine, expire_on_commit=False)

class Base(DeclarativeBase): pass

class User(Base):
    __tablename__ = "users"
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(unique=True, index=True)
    name: Mapped[str] = mapped_column(nullable=False)

async def get_db():
    async with AsyncSessionLocal() as session:
        yield session