Why doesn't scrapy accept more than one cookie?

Question

Python

Hello.
The essence of the question is this: there is a certain site, I log in to it using phantomjs, I get a json file with cookies.
After that, I would like to give these cookies to scrapy, so that scrapy logs in and fetches information from the site.
When testing the code below on httpbin.org/cookies, no cookies were received.
If I set an index, for example cookies[0], then I get one cookie on httpbin.org/cookies (which is predictable). But you need to give everything from the json file.

class MySpider(BaseSpider):
    name = 'MySpider'
    start_urls = ['http://site.ru']

    def get_cookies(self):
        os.system("phantomjs ~/ph.js")
        with open('cookie.json') as data_file:    
            data = json.load(data_file)
        print data
        return data

    def parse(self, response):
        cookies = self.get_cookies()
        return Request(url="http://httpbin.org/cookies", cookies=cookies,
            callback=self.after_login)

    def after_login(self, response):
        print response.body_as_unicode().encode('utf-8')