Python Django每次登录苹果时都会创建新用户

通过查看此存储库的代码，我在Django上实现了使用apple后端登录

我对代码做了很少的更改，这些更改不应影响任何逻辑（如更改声明名称等）

奇怪的是，每次iOS应用程序登录苹果时，它都会重新创建一个新用户

我知道有什么办法可以解决这个问题吗

class AppleOAuth2(BaseOAuth2):
    """
    Custom BaseOAuth2 backend class for
    Sign in with Apple

    Usage:
    Add this to AUTHENTICATION_BACKENDS on settings.py
    """

    name             = 'apple'
    ACCESS_TOKEN_URL = 'https://appleid.apple.com/auth/token'
    SCOPE_SEPARATOR  = ','
    ID_KEY           = 'uid'

    @handle_http_errors
    def do_auth(self, access_token, *args, **kwargs):
        """
        Finish the auth process once the access_token was retrieved
        Get the email from ID token received from apple

        do_auth override this method as you need to verify the code or access token given
        by mobile client from apple and get the ID token from which other details can be extracted.
        """

        ## Retrieve django project stored data
        client_id, client_secret = self.get_key_and_secret()

        headers = {'content-type': "application/x-www-form-urlencoded"}
        data = {
            'client_id'    : client_id,
            'client_secret': client_secret,
            'code'         : access_token,
            'grant_type'   : 'authorization_code',
            'redirect_uri' : 'https://example-app.com/redirect'
        }



        ## Form data

        # ID Token(= from AppleID Service)
        res = requests.post(AppleOAuth2.ACCESS_TOKEN_URL, data = data, headers = headers)
        response_dict = res.json()
        id_token = response_dict.get('id_token', None)


        # Response Data
        response_data = {}

        if id_token:
            decoded = jwt.decode(id_token, '', verify = False)
            response_data.update({'email': decoded['email']}) if 'email' in decoded else None
            response_data.update({'uid': decoded['sub']}) if 'sub' in decoded else None

        # Response
        response = kwargs.get('response') or {}
        response.update(response_data)
        response.update({'access_token': access_token}) if 'access_token' not in response else None



        ## Authenticate
        kwargs.update({'response': response, 'backend': self})
        return self.strategy.authenticate(*args, **kwargs)


    def get_user_details(self, response):
        """
        get_user_details override just to give the email address or other user
        information back to the Python Social Auth framework
        """
        email = response.get('email', None)
        details = {
            'email': email,
        }
        return details


    def get_key_and_secret(self):
        """
        get_key_and_secret override this as you have to generate
        the client secret the way mentioned above

        :return:
        - App Bundle ID
        - Client Secret
        """
        headers = {
            'kid': settings.SOCIAL_AUTH_APPLE_KEY_ID
        }

        payload = {
            'iss': settings.SOCIAL_AUTH_APPLE_TEAM_ID,
            'iat': timezone.now(),
            'exp': timezone.now() + timedelta(days = 180),
            'aud': 'https://appleid.apple.com',
            'sub': settings.SOCIAL_AUTH_APPLE_APP_BUNDLE_ID,
        }

        client_secret = jwt.encode(
            payload,
            settings.SOCIAL_AUTH_APPLE_KEY_SECRET,
            algorithm = 'ES256',
            headers = headers
        ).decode("utf-8")

        return settings.SOCIAL_AUTH_APPLE_APP_BUNDLE_ID, client_secret

我从苹果那里得到了错误

{'error': 'invalid_grant', 'error_description': 'The code has expired or has been revoked.'}

---

似乎id_标记为None，因此uid也为None。我从中得到错误响应