def METHOD_NAME(self) -> Optional[str]:
    """
    The type of billing. Will be MAU for all new customers. If 'Auths', it can be updated to 'MAU'. Cannot be changed if value is 'MAU'. Learn more about Azure AD B2C billing at [aka.ms/b2cBilling](https://aka.ms/b2cbilling).
    """
    return pulumi.get(self, "billing_type")