http exception when getting access_token with refresh_token

[rcholic]

I put some logging statements in the credentials.py file to see what's going on:

Access Token Expired, refreshing access token...
the data below comes from my td_credentials.json file, which is posted to TD API to get access_token

data:  {'client_id': 'CV72580QKIEV4MOLPDGFXMDJC1YLSJ7I', 'grant_type': 'access_token', 'access_type': 'offline', 'refresh_token': 'redacted-----HkvASvG100MQuG4LYrgoVi/JHHvlO8IGgyu3fLRYaZKUDDce+CwdqwI7pVI8NW2owQFhIVg1sdpqQuZpuZtAeToZ63bxrELM5TEgpF/C6BoQNY2T0pkn22zgJnVduGAJvgzHOzybjzBasHkfO0d37ppqC0Cdr9urd4a4Rycp195EJLBpc8k3TnCkQ3d3dq9SjCoIdPvMVemeOcAbFmDZgM0KhDQtjJOuJA4QBvYBnhyB3FKDPlm3OnvajRTEHxzvNswfEWiZ/yWbZzK+hdO3ZWCwsM/70cyZ1phM0mE6Hat/oQYTj2M8VcDsrKxyWyFX4swgAQYDGgvCw5L'}

I got response 400 meaning the request is a bad request
response: <Response [400]>

Traceback (most recent call last):
  File "/Users/user1/temp/v2/test8.py", line 4, in <module>
    tos_client = TOSClient('my-app-consumer-key', '/Users/user1/temp/v2/project/tokens.json')
  File "/Users/user1/temp/v2/project/server/toolbox/TOSClient.py", line 23, in __init__
    td_credentials = TdCredentials(
  File "/Users/user1/env/lib/python3.9/site-packages/td/credentials.py", line 62, in __init__
    self.from_credential_file(file_path=credential_file)
  File "/Users/user1/env/lib/python3.9/site-packages/td/credentials.py", line 377, in from_credential_file
    self.from_token_dict(token_dict=token_dict)
  File "/Users/user1/env/lib/python3.9/site-packages/td/credentials.py", line 248, in from_token_dict
    self.validate_token()
  File "/Users/user1/env/lib/python3.9/site-packages/td/credentials.py", line 580, in validate_token
    token_dict = self.grab_access_token()
  File "/Users/user1/env/lib/python3.9/site-packages/td/credentials.py", line 560, in grab_access_token
    raise requests.HTTPError()
requests.exceptions.HTTPError

I installed this library using pip install btw. Is there any known issue?

this below method in credentials.py throws the exception above:

    def grab_access_token(self) -> dict:
        """Refreshes the current access token.

        This takes a valid refresh token and refreshes
        an expired access token. This is different from
        exchanging a code for an access token.

        ### Returns
        ----
        dict:
            The dictionary contain all the token
            info.
        """

        # build the parameters of our request
        data = {
            'client_id': self.client_id,
            'grant_type': 'refresh_token',
            'access_type': 'offline',
            'refresh_token': self.refresh_token
        }

        # Make the request.
        response = requests.post(
            url="https://api.tdameritrade.com/v1/oauth2/token",
            headers={
                'Content-Type': 'application/x-www-form-urlencoded'
            },
            data=data
        )

        if response.ok:
            return response.json()
        print('data: ', data)
        print('response: ', response)

        raise requests.HTTPError()