pip install aiohttp_proxy

import aiohttp
from aiohttp_proxy import ProxyConnector, ProxyType
async def fetch(url):
    connector = ProxyConnector.from_url('http://user:password@127.0.0.1:1080')
    ### or use ProxyConnector constructor
    # connector = ProxyConnector(
    #     proxy_type=ProxyType.SOCKS5,
    #     host='127.0.0.1',
    #     port=1080,
    #     username='user',
    #     password='password',
    #     rdns=True
    # )
    async with aiohttp.ClientSession(connector=connector) as session:
        async with session.get(url) as response:
            return await response.text()

from aiohttp_proxy import open_connection
async def fetch():
    reader, writer = await open_connection(
        socks_url='http://user:password@127.0.0.1:1080',
        host='check-host.net',
        port=80
    )
    request = (b"GET /ip HTTP/1.1\r\n"
               b"Host: check-host.net\r\n"
               b"Connection: close\r\n\r\n")
    writer.write(request)
    return await reader.read(-1)