Invoke-PnPGraphMethod - "/delta" - return @odata.DeltaLink response alongside @odata.nextLink

[jkaczor]

Some Graph API endpoints allow the use of "delta" to return only items which have changed:

• Get incremental changes for users
• Get changes to events
• Get incremental changes for groups
• Get incrmental changes to messages

While, I can successfully craft the Graph URL parameter to include "/delta", and in combination with the "-All" parameter, Invoke-PnPGraph method will return all results - however, it does not return the @odata.DeltaLink at the end, only the final @odata.nextLink

Therefore, the deltaToken is not returned, so I cannot save and tuse in a subsequent call to return only items which have changed.

It would be very useful if this could be returned - it would help with some limitations we have found with Get-PnPAzureADUser - which does not appear to support advanced "-Filter" parameters (ie. "onPremisesExtensionAttritubes.extensionAttribute1 eq 'x'"), nor does it seem able to return any of the "onPremisesExtensionAttritubes" when added to the "-Select" parameter.