Provide resource (UU)IDs

Give each resource an id attribute by default. Use UUIDs unless you have a very good reason not to. Don’t use IDs that won’t be globally unique across instances of the service or other resources in the service, especially auto-incrementing IDs.

Render UUIDs in downcased 8-4-4-4-12 format, e.g.:

"id": "01234567-89ab-cdef-0123-456789abcdef"