Only 200 Ok is considered successfull

[gsportrix]

I saw that successfull is defined in dream like

type successful = [
  | `OK
  | `Created
  | `Accepted
  | `Non_Authoritative_Information
  | `No_Content
  | `Reset_Content
  | `Partial_Content
]

for the simple get/post these should be considered as ok. right now 204 No_Content raises an error.