`Specimen`

Represents a specimen, remembered or forgotten.

field	type	required	description
`specimen_id`	integer	-	UID of this specimen
`owner_id`	integer	yes	(Internal) id of the user who owns this specimen
`owner`	`User`	no	User who owns this specimen
`born_at`	timestamp	no	When this specimen came into existence. Will be set to `now` if not given.
`forgotten_at`	timestamp?	no	When this specimen was forgotten.

POST /specimens
- Create and return a new Specimen .
- The owner may be specified in place of the owner_id. In this case it should be in the form of a User (as in POST /user).
  - Supplying both an owner_id and owner is not supported.
  - If an owner object is supplied and a User already exists with the given twitch_id, then that User will instead be updated with the given fields, and the user_id of the existing User will be used as the owner_id of the created Specimen.
GET /specimens
- Returns Specimens matching the provided filters.
- Supported filter parameters:
  - specimen_id
  - owner_id
  - born_after
  - born_before
  - forgotten - boolean, filters by whether forgotten_at is set.
  - forgotten_after
  - forgotten_before
GET /specimens/{specimen_id}
- Get the Specimen with the given id.
PATCH /specimens/{specimen_id}
- Updates the given Specimen
- Supports updating owner_id and forgotten_at
DELETE /specimens/{specimen_id}
- Deletes and returns the given Specimen
* /specimens/{specimen_id}/owner
- Inherits all routes from the /users/{user_id} route with the associated owner_id.

// Notably, the inheritance allows a lot of cyclic references. You can for example do GET /events/1/user/specimen/owner/specimen/user/... and obtain the expected response. Each level adds the relevant filter parameter or overwrites it if the parameter is already set.