我试图使用python和django 1.9发送对苹果的身份验证请求，但始终给我unsupported_grant_type

如何解决我试图使用python和django 1.9发送对苹果的身份验证请求，但始终给我unsupported_grant_type

我正在尝试使用Python和Django 1.9发送对苹果的身份验证请求，但始终给我unsupported_grant_type：

def login_with_apple(self,code):
    apple_url = "https://appleid.apple.com/auth/token"
    client_secret = generate_apple_client_secret()
    adapter = AppleOAuth2Adapter(self.request)
    headers = {'content-type': 'application/x-www-form-urlencoded'}
    data = {'client_id': settings.CLIENT_ID,'client_secret': client_secret,'code': code,'grand_type': 'authorization_code'}

    resp = requests.post(url=apple_url,data=data,headers=headers)
    access_token = None
    if resp.status_code in [200,201]:
        try:
            access_token = resp.json()
        except ValueError:
            access_token = dict(parse_qsl(resp.text))
    if not access_token or 'acces_token' not in access_token:
        raise OAuth2Error(
            'Error retrieving access token: %s' % resp.content
        )
    return access_token

我如何生成client_secret：

def generate_apple_client_secret():
    Now = datetime.utcNow()
    claims = {
                'iss': settings.soCIAL_AUTH_APPLE_TEAM_ID,'aud': 'https://appleid.apple.com','iat': Now,'exp': Now + timedelta(days=180),'sub': settings.CLIENT_ID,}
    headers = {'kid': settings.soCIAL_AUTH_APPLE_KEY_ID,'alg': 'HS256'}
    client_secret = jwt.encode(
                payload=claims,key=settings.soCIAL_AUTH_APPLE_PRIVATE_KEY,algorithm='HS256',**strong text** headers=headers).decode('utf-8')
    return client_secret

我向苹果发送了一个请求，但总是给我这个错误：

user = self.login_with_apple(ser.instance.token)
File "/home/omar/PycharmProjects/Aswaq/oscarapi/views/login.py",line 488,in  
login_with_apple
Error retrieving access token: %s' % resp.content
OAuth2Error: Error retrieving access token: {"error":"unsupported_grant_type"}