Generating forbidden error 403 invalid client id

# Get access token (you may use your own method to obtain the token)
def get_access_token(client_id, client_secret):
    auth_url = 'https://ims-na1.adobelogin.com/ims/token/v1'
    headers = {'Content-Type': 'application/x-www-form-urlencoded'}
    data = {
        'client_id': client_id,
        'client_secret': client_secret,
        'grant_type': 'client_credentials',
        'scope':'openid AdobeID'
    }
    response = requests.post(auth_url, headers=headers, data=data)
    return response.json().get('access_token', '')

# Combine PDFs using Adobe PDF Services API
def combine_pdfs(access_token, input_file1, input_file2, output_file):
    api_url = 'https://pdf-services.adobe.io/operation/combinepdf'
    headers = {
        'Content-Type': 'application/json',
        'Authorization': f'Bearer {access_token}'
    }

    data = {
        "inputs": [
            {"url": f"file://{input_file1}"},
            {"url": f"file://{input_file2}"}
        ],
        "output": {"url": f"file://{output_file}"}
    }

    response = requests.post(api_url, headers=headers, data=json.dumps(data))

    if response.status_code == 200:
        print(f"Combined PDF saved to: {output_file}")
    else:
        print(f"Error combining PDFs. Status code: {response.status_code}, Response: {response.text}")

# Get access token
token = get_access_token(client_id, client_secret)

# Combine PDFs
combine_pdfs(token, input_file1, input_file2, output_file)