Not saving new credentials file to path when generating new refresh_token

[leassaf]

When creating new credentials with new refresh_token, you set is_access_token_expired to False, and than it doesn't save it to the json file path. so one repeats generating new credentials over and over again.

In file credentials.py added after the first if statement:

def validate_token(self) -> None:
        """Validates the access token and refresh token.

        ### Overview
        ----
        A TD Ameritrade Access token is only valid for 30 minutes,
        and a TD Ameritrade Refresh token is only valid for 90 days.
        When an access token expires, a new one is retrieved using the
        refresh token. If the refresh token is expired the oAuth workflow
        starts again.
        """

        if self.is_refresh_token_expired:
            print("Refresh Token Expired, initiating oAuth workflow...")
            self.from_workflow()

            # save to json file
            if self._loaded_from_file:
                self.to_credential_file(file_path=self._file_path)

        if self.is_access_token_expired:
            print("Access Token Expired, refreshing access token...")
            token_dict = self.grab_access_token()
            self.from_token_dict(token_dict=token_dict)

            if self._loaded_from_file:
                self.to_credential_file(file_path=self._file_path)

[monsieur40a]

I fixed this with the auth-refactor branch. I have a variable called something like first_run that saves the json.