import requests
from requests.auth import HTTPDigestAuth
url = 'https://mail.ru'
r=requests.get(url, auth=HTTPDigestAuth('1234@mail.ru', '1234'))
print(r.url)
#выводит https://mail.ru

r = requests.get('https://mail.ru', auth=('1234@mail.ru', '1234'))
print(r.url)
#выводит https://mail.ru

import requests
url = 'https://mail.ru'
username = '1234@mail.ru'
password = '1234'
user_data = {'username': username, 'password': password}
response = requests.post(url, data=user_data)
print(response.url)
#выводит https://mail.ru