raise HTTPException(status_code=400, detail="Invalid X-Token header")
    if item_id not in fake_db:
        raise HTTPException(status_code=404, detail="Item not found")
    return fake_db[item_id]


@app.post("/items/", response_model=Item)
async def create_item(item: Item, x_token: Annotated[str, Header()]):
    if x_token != fake_secret_token:
        raise HTTPException(status_code=400, detail="Invalid X-Token header")

@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])

@app.get("/query/param-required/int")
def get_query_param_required_type(query: int = Query()):
    return f"foo bar {query}"


@app.get("/enum-status-code", status_code=http.HTTPStatus.CREATED)
def get_enum_status_code():
    return "foo bar"


@app.get("/query/frozenset")
def get_query_type_frozenset(query: FrozenSet[int] = Query(...)):
    return ",".join(map(str, sorted(query)))