It gives me an error, and I do not know why [robloxapi]

I am not sure why it gives me an error, but here is the script and I would like to know why it gives me an error and how do I resolve it.

SCRIPT:

import requestsend = []usernames = ['roblox']username = usernames.pop(0)u = str(username) r = requests.get(f'https://www.roblox.com/user.aspx?username={username}').urlif 'www.roblox.com/users/' in r:        userid = r.split('/')[-2]        id = [1700848132]        b = requests.post(f'https://presence.roblox.com/v1/presence/userpresencetype', json={'userId': id}).json()[0]        print(f'{b}:{u}')

ERROR:

line 11, in <module>    b = requests.post(f'https://presence.roblox.com/v1/presence/userpresencetype', json={'userId': id}).json()[0]        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^KeyError: 0

I was expecting it to work since I got it from an experienced roblox api proogrammer, but it does not work.