Python Function Returns None even though Return is stated

Code
import requests



x = input("Gib email pls")



def CheckReg(page): #Checks if amazon account exists.

    try:

        with ss as requests.Session:

            ss.headers.update(

                {

                    'Host': 'www.amazon.com',

                    'User-Agent': 'Mozilla/5.0 (iPad; CPU OS 6_0_1 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A523 Safari/8536.25',

                    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',

                    'Accept-Language': 'en-US,en;q=0.5',

                    'Accept-Encoding': 'gzip, deflate, br',

                    'Content-Type': 'application/x-www-form-urlencoded',

                    'DNT': '1',

                    'Connection': 'keep-alive',

                    'Upgrade-Insecure-Requests': '1'

                })

            r = ss.get('https://www.amazon.com')

            cookies = r.cookies

            r = ss.post('https://www.amazon.com/ap/register?_encoding=UTF8&openid.assoc_handle=usflex&openid.claimed_id=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&openid.identity=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&openid.mode=checkid_setup&openid.ns=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0&openid.ns.pape=http%3A%2F%2Fspecs.openid.net%2Fextensions%2Fpape%2F1.0&openid.pape.max_auth_age=0&openid.return_to=https%3A%2F%2Fwww.amazon.com%2Fgp%2Fyourstore%2Fhome%3Fie%3DUTF8%26ref_%3Dgno_newcust?&email={}'.format(page), cookies=cookies)

            if 'You indicated you are a new customer, but an account already exists with the e-mail' in r.text:

                return True

            elif 'Create your Amazon account' in r.text:

                return False

            else:

                return r.text

    except:

        pass



if __name__ == '__main__':

    y = CheckReg(str(x))

    print(y)