def METHOD_NAME(self) -> Tuple[str, str]:
    """Get the username and password for the registry.
    Returns:
        (str, str): The username and password.
    Raises:
        RegistryError: If there is an error getting the username and password.
    """
    _logger.debug("Getting username and password for Elastic Container Registry.")
    try:
        session = self.environment.get_session()
        client = session.client("ecr")
        response = client.get_authorization_token()
        username, password = base64.standard_b64decode(
            response["authorizationData"][0]["authorizationToken"]
        ).split(b":")
        return username.decode("utf-8"), password.decode("utf-8")
    except botocore.exceptions.ClientError as e:
        code = e.response["Error"]["Code"]
        msg = e.response["Error"]["Message"]
        # TODO: Log the code and the message here?
        raise LaunchError(f"Error getting username and password: {code} {msg}")