How to programmatically add a deferred operation to delete PersonHasQERResource?

Question

We have a use case to to automatically remove a Resource assignment a week after it was assigned. I have tried to use a deferred block similar to this forum: RE: Create a Deferred Event Generation Operation from a Script but I can't find an option to create a deferred operation to "Delete" an entry in the PersonHasQERResource. Any thoughts if there are ways to do this? Thanks in advance!

Markus Weiss-Ehlers · Accepted Answer

You just load the object and delete it then in the deferred operation block. A sample loading the entity to remove (PersonHasQERResource) via the XObjectKey would look like this: 
 Dim dbEntity As IEntity = Session.Source.Get(New DbObjectKey(myXObjectKey), EntityLoadType.Default)

' Create a new deferred block for a specified point in time.
Using New VI.DB.DeferredOperations.DeferredBlock(Session, DateTime.UtcNow.AddDays(30), "Optional description for the deferred operation")
 ' Operations done here are done deferred
 Using uow = Session.StartUnitOfWork()
 ' Delete the entity immediately
 dbEntity.MarkForDeletionWithoutDelay()

 ' put the object in the unit of work
 uow.Put(dbEntity)
 uow.Commit()
 End Using
End Using

How to programmatically add a deferred operation to delete PersonHasQERResource?

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