s = requests.Session()
data = {'login[username]': 'yur4enko.vitya@yandex.ru', 'login[password]': 'YEvbpUZ1i5LanIFnxfVW',}
url = "https://kingfashion.com/customer/account/login/"
r = s.post(url, data=data)
s.cookies

url = "https://kingfashion.com/customer/account/loginPost/"

import requests

s = requests.Session()
data = {'login[username]': 'yur4enko.vitya@yandex.ru', 'login[password]': 'YEvbpUZ1i5LanIFnxfVW'}
url = "https://kingfashion.com/customer/account/loginPost/"
r = s.post(url, data=data)
print (s.cookies)
print (r)

data = {
    'login[username]': 'yur4enko.vitya@yandex.ru',
    'login[password]': 'YEvbpUZ1i5LanIFnxfVW',
}


import requests
session = requests.Session()

# Делаем переход к странице с авторизацией
rs = session.get('https://kingfashion.com/customer/account/')

# Получение поля form_key из формы авторизации
from bs4 import BeautifulSoup
root = BeautifulSoup(rs.content, 'lxml')
form_key = root.select_one('#login-form > input[name=form_key]')
data['form_key'] = form_key['value']

rs = session.post("https://kingfashion.com/customer/account/loginPost/", data=data)
print(rs.url)

root = BeautifulSoup(rs.content, 'lxml')
print(root.select_one('.quick-access.shop > .account'))

https://kingfashion.com/customer/account/index/
<a class="account" href="https://kingfashion.com/customer/account/" title="Виктор Юрченко">My account</a>

https://kingfashion.com/customer/account/login/referer/aHR0cHM6Ly9raW5nZmFzaGlvbi5jb20vY3VzdG9tZXIvYWNjb3VudC9pbmRleC8,/
<a class="account" href="https://kingfashion.com/customer/account/" title="">Sign in</a>