title: TypeError: _request() got an unexpected keyword argument 'cookies' (aiohttp)
body: <pre>
  import random
  import asyncio
  import json
  import aiohttp
  import sys
  import urllib
  from lxml.html.soupparser import parse
  from aiohttp import ClientSession
  from threading import Thread
  
  def ttest():
      async def fetch(url, session):
          headers = {
              'Host': 'example.com'
          }
          cookies2 = {
              'test': 'test'
          }
  
          data = '{"test":"test"}'
          async with session.post(url, data=data, headers=headers, cookies=cookies2) as response:
              return await response.read()
      async def bound_fetch(sem, url, session):
          async with sem:
              html = await fetch(url, session)
              print(html)
  
  
      async def run(r):
          url = "https://test.com"
          tasks = []
          sem = asyncio.Semaphore(1000)
          async with aiohttp.ClientSession() as session:
              for i in range(r):
                  task = asyncio.ensure_future(bound_fetch(sem, url, session))
                  tasks.append(task)
              responses = asyncio.gather(*tasks)
              await responses
  
      number = 1
      loop = asyncio.get_event_loop()
      future = asyncio.ensure_future(run(number))
      loop.run_until_complete(future)
  
  ttest()
  </pre>
  
  <p>This is the error: <code>TypeError: _request() got an unexpected keyword argument 'cookies'</code></p>
  
  <p>I want use cookies like you see in the code, but i can not, can anyone help me?</p>