No matter how you like to participate in developer communities, Pulumi wants to meet you there. If you want to meet other Pulumi users to share use-cases and best practices, contribute code or documentation, see us at an event, or just tell a story about something cool you did with Pulumi, you are part of our community.

Pulumi Community

backup is kind of misnomer in Azure, your best bet is to create a managed disk and attach it to your Compute:
<https://www.pulumi.com/docs/reference/pkg/azure-nextgen/compute/disk/>

and then create a snapshot of it:

<https://www.pulumi.com/docs/reference/pkg/azure-nextgen/compute/snapshot/>

exactly what i needed. thanks for taking the time to reply