FastAPI / SQLAlchemy创建多个用户

from fastapi import FastAPI
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

app = FastAPI()

SQLALCHEMY_DATABASE_URL = "sqlite:///./test.db"
engine = create_engine(SQLALCHEMY_DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String, unique=True, index=True)
    email = Column(String, unique=True, index=True)

Base.metadata.create_all(bind=engine)

@app.post("/users/")
def create_user(username: str, email: str):
    db = SessionLocal()
    user = User(username=username, email=email)
    db.add(user)
    db.commit()
    db.refresh(user)
    return user