RSO_Auth.py

import re, aiohttp, asyncio, json

async def auth(username, password):
    session = aiohttp.ClientSession()
    data = {
        'client_id': 'play-valorant-web-prod',
        'nonce': '1',
        'redirect_uri': 'https://playvalorant.com/opt_in',
        'response_type': 'token id_token',
    }
    await session.post('https://auth.riotgames.com/api/v1/authorization', json=data)

    data = {
        'type': 'auth',
        'username': username,
        'password': password
    }
    async with session.put('https://auth.riotgames.com/api/v1/authorization', json=data) as r:
        data = await r.json()
    #print(data)
    pattern = re.compile('access_token=((?:[a-zA-Z]|\d|\.|-|_)*).*id_token=((?:[a-zA-Z]|\d|\.|-|_)*).*expires_in=(\d*)')
    data = pattern.findall(data['response']['parameters']['uri'])[0]
    access_token = data[0]
    #print('Access Token: ' + access_token)
    id_token = data[1]
    expires_in = data[2]

    headers = {
        'Authorization': f'Bearer {access_token}',
    }
    async with session.post('https://entitlements.auth.riotgames.com/api/token/v1', headers=headers, json={}) as r:
        data = await r.json()
    entitlements_token = data['entitlements_token']
    #print('Entitlements Token: ' + entitlements_token)

    await session.close()
    return (access_token, entitlements_token)