text: from typing import List
  
  import uvicorn
  from fastapi import Depends, FastAPI, HTTPException
  from sqlalchemy.orm import Session
  
  from . import crud, models, schemas
  from .database import SessionLocal, engine
  
  models.Base.metadata.create_all(bind=engine)
  
  app = FastAPI()
  
  
  # Dependency
  def get_db():
      db = SessionLocal()
      try:
          yield db
      finally:
          db.close()
  
  
  @app.post("/users/", response_model=schemas.User)
  def create_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
      db_user = crud.get_user_by_email(db, email=user.email)
      if db_user:
          raise HTTPException(status_code=400, detail="Email already registered")
      return crud.create_user(db=db, user=user)
  
  
  @app.get("/users/", response_model=List[schemas.User])
  def read_users(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
      users = crud.get_users(db, skip=skip, limit=limit)
      return users
  
  
  @app.get("/users/{user_id}", response_model=schemas.User)
  def read_user(user_id: int, db: Session = Depends(get_db)):
      db_user = crud.get_user(db, user_id=user_id)
      if db_user is None:
          raise HTTPException(status_code=404, detail="User not found")
      return db_user
  
  
  @app.post("/users/{user_id}/items/", response_model=schemas.Item)
  def create_item_for_user(user_id: int, item: schemas.ItemCreate, db: Session = Depends(get_db)):
      return crud.create_user_item(db=db, item=item, user_id=user_id)
  
  
  @app.get("/items/", response_model=List[schemas.Item])
  def read_items(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
      items = crud.get_items(db, skip=skip, limit=limit)
      return items
  
  
  if __name__ == "__main__":
      uvicorn.run("sql_app.main:app", host="127.0.0.1", log_level="info", reload=True)
  