Error: Invalid_Client using python

Code Block 
	def login_with_apple(self, code):
  
    client_secret = generate_apple_client_secret()
    apple_url = "https://appleid.apple.com/auth/token"
    header = {'content-type': 'application/x-www-form- urlencoded'}
    data = 'client_id=' + settings.CLIENT_ID + '&client_secret=' + client_secret + '&code=' + code + '&grand_type=authorization_code'
    data = urllib.quote(data)
    resp = requests.post(apple_url, data=data, headers=header)
    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

Code Block 
def generate_apple_client_secret():
    private_key_file = 
open('/home/omar/Downloads/Privat-Key-file.p8', 'rb').read()
    year = new_date_time.now().year
    month = new_date_time.now().month
    day = new_date_time.now().day
    now = int(datetime.datetime(year, month, day).strftime('%s'))
    headers = {"alg": 'ES256', "kid": private_key_file}
    claims = {
        "iss": settings.SOCIAL_AUTH_APPLE_TEAM_ID,
        "iat": now,
        "exp": now + int(datetime.timedelta(days=180).total_seconds()),
        "aud": "https://appleid.apple.com",
        "sub": settings.CLIENT_ID
    }
    client_secret = jwt.encode(
        headers=headers, claims=claims, key=private_key_file, algorithm='ES256'
    )
    return client_secret