Saves the token dict in the specified file
        :return bool: Success / Failure

def save_token(self):
        """
        Saves the token dict in the specified file
        :return bool: Success / Failure
        """
        if self.token is None:
            raise ValueError('You have to set the "token" first.')

        try:
            if not self.token_path.parent.exists():
                self.token_path.parent.mkdir(parents=True)
        except Exception as e:
            log.error('Token could not be saved: {}'.format(str(e)))
            return False

        with self.token_path.open('w') as token_file:
            # 'indent = True' will make the file human readable
            self.serializer.dump(self.token, token_file, indent=True)

        return True