Calling update on an asset with a CheckoutRequest attached breaks JSON Converter

[barrycarey]

If an asset is updated after a checkout request is attached the JSON convert fails

[Christoffleroux]

Also experiencing the same behaviour

[michaeldwood]

I think this may be caused by an inconsistency in what Snipe-It returns rather than with this package.

'assigned_to' is expecting a User model but the API returns an integer of the users id.
However the API also returns a property of 'assigned' which does contain all of the assigned user properties