def METHOD_NAME(self) -> Optional[str]:
    """
    Gets or sets a JSON string containing a list of tags that require user authentication to be used in the push registration endpoint.
    Tags can consist of alphanumeric characters and the following:
    '_', '@', '#', '.', ':', '-'. 
    Validation should be performed at the PushRequestHandler.
    """
    return pulumi.get(self, "tags_requiring_auth")