def METHOD_NAME(certificate_name: Optional[pulumi.Input[str]] = None,
                                           resource_group_name: Optional[pulumi.Input[str]] = None,
                                           resource_name: Optional[pulumi.Input[str]] = None,
                                           opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetSignalRCustomCertificateResult]:
    """
    Get a custom certificate.
    :param str certificate_name: Custom certificate name
    :param str resource_group_name: The name of the resource group. The name is case insensitive.
    :param str resource_name: The name of the resource.
    """
    ...