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Okay. I think I figured out how to use an existing resource group. I just pass in the name of an existing resource group to the VirtualNetwork, PublicIPAddress, NetworkInterface and VirtualMachine constructors. How do I connect to an existing NetworkInterface though? Also, when I try to create the VM based on a marketplace image, I get this error:

Code="VMMarketplaceInvalidInput" Message="Creating a virtual machine from Marketplace image or a custom image sourced from a Marketplace image requires Plan information in the request.

When I try to pass in the plan args instantiated as follows:

plan=compute.PlanArgs(
        name="ngc-pytorch-version-21-04-1",
        publisher="nvidia",
        product="pytorch_from_nvidia",
    ),

into

VirtualMachine(…, plan=plan)

, I get this error:

User failed validation to purchase resources. Error message: 'You have not accepted the legal terms on this subscription:

Could someone help me please?