The @job decorator is not working as documented

[naskio]

I am new to rq and I am to run the following code (extracted from the docs#The @job decorator)

import redis
import rq
from rq.decorators import job
import time

r = redis.Redis(host='localhost', port=6379)
q = rq.Queue(connection=r)


@job('default', connection=r, timeout=5)
def add(x, y):
    return x + y


job = add.enqueue(3, 4)
time.sleep(1)
print(job.return_value())

Running this code is raising the following error:

AttributeError: 'function' object has no attribute 'enqueue'

rq version: 1.16.2
python version: 3.9