sql_app/schema: fix type error

Signed-off-by: HeshamTB <hishaminv@gmail.com>

sql_app/main.py

@@ -4,6 +4,9 @@ from sqlalchemy.orm import Session
 from . import crud, models, schemas
 from .database import SessionLocal, engine
 
+from typing import List
+
+
 models.Base.metadata.create_all(bind=engine)
 
 app = FastAPI()
@@ -26,7 +29,7 @@ def create_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
     return crud.create_user(db=db, user=user)
 
 
-@app.get("/users/", response_model=list[schemas.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