Same thing as for `_get_chat()` but for the user related to the
        message.

def _get_user(self) -> Dict:
        """
        Same thing as for `_get_chat()` but for the user related to the
        message.
        """

        if 'callback_query' in self._update:
            return self._update['callback_query']['from']
        elif 'inline_query' in self._update:
            return self._update['inline_query']['from']
        elif 'message' in self._update:
            return self._update['message']['from']